Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c14bc773274b840…

MALICIOUS

PDF

92.0 KB Created: 2021-08-03 21:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3740ee1570ba6a5493634e74397cdce9 SHA-1: 7457c3f5480a8d7415b59bc5a70f7b4f9b176924 SHA-256: 6c14bc773274b840573631f2167f2790dd81451ed05fce3671ad3ded25281c5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608c67e119017---munuwopixola.pdf In PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ba29ce0fa2b---fekoli.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/55793521416.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/popaxivemi.pdfIn PDF document text
    • http://bluedevils59.com/clients/862365/File/55718490367.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/515edc5ad19fc9d7f5da47fc14c97f8f/wogowodivanapi.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/67624238980.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf75b5f0323---suriju.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098438b6fea8---sejotebolokunov.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/a78e9ab6da9d26deee5a51042b6c4222/62718040572.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d71082e533---bojulagoremefuf.pdfIn PDF document text
    • http://guowangcable.com/d/files/pavorujupebivizopabapaf.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/pidux.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/667dea4910cd1b21fcc119adce81d737/43945495590.pdfIn PDF document text
    • http://antae.be/app/webroot/uploads/file/varezapetuzabodowipusatoj.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/j0p6etm6he955hfbubjjekfchj/639763185.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16076662fe67c7---64155641990.pdfIn PDF document text
    • http://greenld.com/userfiles/87091522818.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/5e9b286d6d8e4a85c12ad2308bc672bf/60955456417.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/b2d5599108ae299c1eed93fbab2e2ff8/tojimibujuri.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/76900763058.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/23204175579.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/qkjglv3d8h4h96sj1fehmghk24/85899566072.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+install+a+chain+link+fence+gatePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10432 10684 bytes
SHA-256: 4a7f684a1afac58e36784cfe70c12eca0cc30fc0fcf63fbd8eb7e8986d1c5bb9
font_01_sfnt_off00011ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA9 16896 bytes
SHA-256: 48ae40ded3dc5beb23c59063bcf8f00219ef42e33e96e950e56273004175008f
font_02_sfnt_off000148b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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