Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f57617d9a48111…

MALICIOUS

PDF

43.0 KB Created: 2021-06-30 21:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8e9ba7b1d050a796260ac0e93de47188 SHA-1: 84c6b6885f0637e6926158eceab3917b32b3939a SHA-256: 85f57617d9a481119d9dcc0df0ff23e9b35bb0ba995f3719ab027f82e48cd5c3
214 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and a machine learning classifier. It employs a common phishing tactic by presenting itself as an image-only lure, typical of screenshot lures designed to trick users into clicking embedded links. The document contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute further malicious content or redirect users to phishing sites. No scripts were extracted, but the presence of external URIs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7092

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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://actor-conseil.com/files/file/semera.pdf In PDF document text
    • https://mebelihome.ru/upload_picture/motijamojifesewuviletuken.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ba17299c0f0---suwokabevumuwuzebez.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/tl5fa9jrmistcod482u09kcmd0/mepebudiginubulojosol.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/8b7caaaa573f2f99c974cd7919b22512/mozojujowa.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/xukuzakopenejoxakebidugov.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b14197eb9---20252111359.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/741165903f1bddc5390f568289f53bd0/xezodesojimisawusi.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b741274bb---vekobukuxifap.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080fa4a7bcc1---91127047829.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/kinodifavunaxum.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073203d4efed---34851200146.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/d67163ed665205cacda87b3bc44d2768/wibokirabudixejibogegal.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/e40df86e858b9e55ac3d812a3c8fcadc/80347660053.pdfIn PDF document text
    • https://seikai.jp/free_images/files/lokir.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/40fcb1427e3d6b53cd4b793d537de306/nolezu.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/2o2dopre546e69qoba84u4q2hd/lupadesivotabigevum.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/abd74d267400f97d22d505b2ce53194a/jupivuwedoli.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/84041804387.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/bixeputaludi.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/27357525158.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/jao6fufs79ki5hcirshiep6pur/fesemipukukajakesumori.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/o6cijbnl8p3spos5uhv98tmdli/rujinab.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/dozituwipubebulofal.pdfIn PDF document text
    • https://www.mnspineandsport.cIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=ap+calculus+student+handout+college+board+2017+answersPDF link annotation