Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e8552b4a110e4d5…

MALICIOUS

PDF

67.9 KB Created: 2021-06-23 20:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ff450853955b452d455b0fcd64a756b7 SHA-1: f14bf60bd12b8f396ef6c5416624a2c00bdfeda6 SHA-256: 7e8552b4a110e4d59489aa150bb94f8b19608ad1bbc7b2c8f3ed7b3a6d6fb38c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8841

Heuristics 5

  • 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.
  • 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://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160988b8bb2f69---radazepolijosubitoru.pdf In PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876c1cebb07---pasetubapevufurag.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/t781s0r1o58a7bbfqjfkdtnq7o/zafuzepuzuma.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/tuveg.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/98700767560.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607174bccce4d---zaturorokegejuresitulovu.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210524173258_tk2als.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/10191703250.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707645c51ff---xabimalofosin.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a70d58aa67a---61620727310.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/kcpfc1aomuo5v73uggm5lkivt0/18683028046.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/vpuk4lovvhg28b5ifc2d8ftedh/96865617752.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c924c4939d8---vijopomereren.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/0f1110a3bacc2cd0b71128cfbea4e7cb/xunapopugizusinupusifej.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/zipegulisobil.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/63249881084.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086235a361fc---kafifabi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=tc20+empires+and+puzzlesPDF link annotation

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