Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d6c0cdce2a27da…

MALICIOUS

PDF

48.0 KB Created: 2021-09-25 22:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 97c73a2b7b4f0dc0e6209a689c4ab014 SHA-1: 8c758430bb0fa7c712b23d51bbdd5f8f740482a1 SHA-256: 98d6c0cdce2a27da0ba943f554afe577236bd035148580eda9db519a158358a4
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF is identified as a phishing lure due to its image-only nature and a clickable link. The link directs to a PDF hosted on a compromised WordPress site, a common tactic for distributing malicious content. Multiple heuristics indicate a link farm pointing to disposable or compromised hosting, suggesting an attempt to evade detection and distribute a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7444

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 48 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://crewmak.ru/uplcv?utm_term=mma+trainer+apk PDF link annotation
    • https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/51184486745.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/70125471820.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/pefasokelezasajesojuzok.pdfIn PDF document text
    • http://humanlitech.com/files/files/xumaredoxat.pdfIn PDF document text
    • http://kahasat.cz/data/file/gakasunubom.pdfIn PDF document text
    • https://expomediainc.com/upload/file/82548127254.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/49824019544.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/6934526729.pdfIn PDF document text
    • https://franciscojaviermoreno.com/DocsCKeditor/files/48108855332.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/38311849031.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/21526002754.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/24045456263.pdfIn PDF document text
    • http://runnersavezzano.it/public/userfiles/file/jevaxetomodifatideka.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/dobakemanivujugelutes.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/78636903932.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16148bbb6c2eb5---bebonepiro.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/58342456842.pdfIn PDF document text
    • http://ranchobg.com/img/file/37829045666.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/77967515998.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/92989728106.pdfIn PDF document text
    • http://carraracucinecomponibilitrapani.it/userfiles/files/397949838.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/28342837583.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/fezojogadogiraxen.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b672e7f494---zegolebofatujamo.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ce9ece8429---48391739283.pdfIn PDF document text

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