Malicious PDF — malware analysis report

Static analysis result for SHA-256 447ae70217c5f1f1…

MALICIOUS

PDF

86.2 KB Created: 2021-07-20 14:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fafd20206276507388247b8340fccd11 SHA-1: 77b32bfce89a12ee5fc8b9e8be04500276d0db29 SHA-256: 447ae70217c5f1f1e16d3a0068684da150b79e56680b9f699aece09e9750044b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://elijasprojekts.lv/files/file/posemudupururakojosug.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/n3d15h83u3bc4if8c4pig055o3/kiruf.pdf
    • http://thailaundry.com/imgUpload/files/84909472009.pdf
    • https://ap-qatar.com/userfiles/files/ralojojewigasuji.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/6mbrvlmb4ss863si0fk5177g43/penorotegumodifavemej.pdf
    • http://kiavysocina.cz/UserFiles/File/xodedebiluxavozuvuget.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160842abf2f7d4---35945846916.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/a7d47649a42fbf5dfb8b73af3be8c73c/davomalen.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/0749st0qhvf122ttoe0st0lac3/serojedad.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/a87cc95c97f7ca53c52a4e42f29cfc69/kikatiwoniwozukolek.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d1ae1dd34---zaledawirupomulukimokawe.pdf
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/21782157883.pdf
    • https://detmers-kontejner.hr/files/60529060978.pdf
    • http://studiozammuner.eu/userfiles/files/23732229903.pdf
    • https://iwnta.com/userfiles/file/42736882604.pdf
    • http://dui-antidote.com/images/userfiles/file/4909760363.pdf
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/55358341739.pdf
    • http://aimic.com/userfiles/file/wudexagepisewadajidiv.pdf
    • https://bevelec.com/bevelec/dossierMois/file/45531490487.pdf
    • https://oliogalanis.com/file/35344207155.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9feb772980---xotorunakufawo.pdf
    • http://yonseri.org/userfiles/files/25819529591.pdf
    • http://thanhlapcongtykiengiang.com/upload/ck/files/migurizapikizabuniz.pdf
    • http://hodinovysoused.cz/upload/file/19848127063.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7bba0837a---lipawawugijoputotugese.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=authorization+letter+for+bank+sample
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECE2 16792 bytes
font_01_sfnt_off000104f9.bin
fd74dec3b65bbab4a62c8dfef49c3d65f4e6b743835429c947a3e501047305f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x104F9 10996 bytes
font_02_sfnt_off00011e29.bin
fb96aa040de4482e44a38d311a69412541095b36dc0c333a90acfaacdc86e68b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E29 17324 bytes