Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a76f04a61d86891…

MALICIOUS

PDF

88.6 KB Created: 2021-06-25 20:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4f44ff518780b5ea21b8edbc53bf2e2c SHA-1: c5ba2e1d3907a540ac34e2da297857e1592dc909 SHA-256: 7a76f04a61d86891cd92d0b72349d27e9c601e74cb5b8d7177a2356d4fcd7bd2
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content. The presence of external URIs and a callback lure heuristic further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • 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://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/ihlb4arkuabfrlqul4mqhpoi04/besutonixulogefarokup.pdf In PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609869513b81c---monuniv.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/wosanumonasebi.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/fujomoje.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/9170769860.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/f3f46a3b0fb3fd75cd3dc3470c789939/pokitexelogeritawame.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875745a93c9---xufizulinekizo.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/xogamixamaka.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e92325c86---44580610998.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/88ea66cfeb7a78707b18b5e9447cd162/suzapanufu.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/490647aa4de34170c5ecc997bd4ec4ab/95466148494.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bec1af8c896---bowipaxedazoxikizokoxowe.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/90168862846.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/jixawewivak.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864e2b7f74f---44502184385.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/cee84f3a7cf93fa229aeadeaeb8e76b6/gepafosagelesobax.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/menaxixur.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a1321c020e0---36699989120.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/d4d9b530766e572232b017b373a53809/nufugilososurutifinew.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16089682f37774---29348383711.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/f7f90d719bd8c2825f8dd34d0ce71c92/ravalojeposipusopeludupa.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/mopijedus.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/339io01hpttldequobt68gp49b/zuduwekelexel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=kamyab+jawan+loan+terms+and+conditionsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF504 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D16 17684 bytes
SHA-256: 27bcd4eb189a532b89e58992cee1d23099fd1d36e127673957b4ca85d496be22
font_02_sfnt_off00013bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAD 10992 bytes
SHA-256: 9356466cce91953657c7dd33a7ac5f756c94419d5e5e5d119e13d2b68b900e9a