Malicious PDF — malware analysis report

Static analysis result for SHA-256 1499049f421bcda7…

MALICIOUS

PDF

107.9 KB Created: 2021-06-28 22:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f7e687787759cfcaca7369b2c6eded8f SHA-1: a3a900a4c4d94c135f6cc0656e18592ea4345689 SHA-256: 1499049f421bcda7bf2d28133abc903fc22841e0b5dadd707787e4f30d218742
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document employs social engineering by presenting a lure that prompts the user to install a browser extension or update, a common method for distributing malware or stealing credentials. The presence of numerous external links, many pointing to compromised CMS upload directories, further supports a malicious phishing or spamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/06j474mpibh1n5jugm7n08v2l4/16733268259.pdf In PDF document text
    • https://condominiovillage.com/userfiles/file/vusolenokebebagik.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160982c37e9c33---wizudukijugojivunulob.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdafd86bf5---fakubowu.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/90bcbf95d79d342541f615e959fb7d85/nigigidoposinalipufodiku.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/4omhupimr716sf08g1e0m8ap0l/65656587852.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bed29e07e7---sugam.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/43146540544.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/49435a7aeddec98f97da94f8dcdbada8/daxudavupevetabexu.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a84d7ce11---zuvutiza.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a47b08d40be---50975811247.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/96005710728.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/9894703078.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/58737569559.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/98398be42d271aa344de9db5fd90debf/vatowinagawekezemotiga.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609223f28b722---ridaxeg.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/nuxavujemonawamu.pdfIn PDF document text
    • https://hagepoorter.be/files/files/fonaloxapezinileko.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/gqlrqqmpkdlksjimi4dg8tvfr4/gimulufumefulanonenoridiw.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/zetitilekuz.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d7d9f30d6---39427656697.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/078099525514bb1b36b65ee85071287b/kukomenoborafafutat.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/14363826874.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160767b24a575a---34781962388.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=affidavit+template+south+africa+wordPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001295f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295F 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_01_sfnt_off00013edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000156f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156F2 11016 bytes
SHA-256: 8362de708b1f2f36c77f3509079da6ee7285ea3720994945ff86f4aeb7e2e40b
font_03_sfnt_off00017097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17097 18532 bytes
SHA-256: 4c47166ae34726556246b6f8b951a4bd7b0dc1404156e31ad34c8b0106188631

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