Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ffe1c25e82b470…

MALICIOUS

PDF

83.3 KB Created: 2021-09-03 06:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1f69c6488758b3f3bc0dc8704be09947 SHA-1: 5fc5e2e5372ee342be8b6834d8665752f212b956 SHA-256: 94ffe1c25e82b4708679105a07021e5f025ed75e0dcce14df5ad93cd7a4212ab
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam pretext, aiming to trick users into interacting with the document's content. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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) 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://oniceh.ru/uplcv?utm_term=precontraint+502+pdf PDF link annotation
    • https://red-adlay.com/upload/files/40695461168.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5c40d68d0d57fdc98dc2fd2461e436f8/53074157594.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/tr7p95bv88jv78uag9d0cdveo5/99592841649.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/gaxibowikifujosafazonoti.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/7jd8t36q7lskit3b0tn3hminl2/mebomajadagixamoxipef.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160e3b550426b4---50206630578.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fd56965cf---81774358720.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/pedibiripomizur.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/zaxezase.pdfIn PDF document text
    • http://www.ddu-hk.cz/ckfinder/userfiles/files/lazom.pdfIn PDF document text
    • http://slsnn.ru/content/file/jofiwewikokaf.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/fb684633e1eeca9685a3d324510b777c/sexovasevagafurukumaw.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160701b91e9ba2---10928560106.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/56863809296.pdfIn PDF document text
    • http://wwstationery.com/files/file/nemojavezesudu.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a402c2e3b---ganumanen.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/kezipiworanedon.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/27818807533.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607196194be0e---mijipereje.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202108271744328931.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/70565991781.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5b9f78ded---87183447872.pdfIn PDF document text
    • 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_off0000dadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADB 20012 bytes
SHA-256: a0172cdda1ec461361a63ba1234b25ebcc4fc6c3863ff4e439143bd733f8a44a
font_01_sfnt_off00010f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F36 10776 bytes
SHA-256: ab7cc719426df07ff79c8ac35f659e6702827f756ad2f664fcc3c60bcc5c9847
font_02_sfnt_off00012839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12839 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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