Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df6acf963836e4c…

MALICIOUS

PDF

64.3 KB Created: 2021-09-01 00:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 190e9487428b591a700c02b821eebd57 SHA-1: f017b7b31d2e8aad03542a216d34463618f0755a SHA-256: 0df6acf963836e4c4615bf8e3a1814ecd84d42695a05f8f40313dbc8adac0293
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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://oniceh.ru/uplcv?utm_term=the+great+american+swindle PDF link annotation
    • https://bishopsalamatkhokhar.org/userfiles/file/29767912983.pdfIn PDF document text
    • http://universe-micro.com/upload/files/20210707_235705.pdfIn PDF document text
    • http://wahibluedevils76.com/clients/5/55/55d7338a7abcce318bc847d7f34994f5/File/gitureze.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/jamebenopokide.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/e0a64eb59f0a2ffe52f765c427fd4e58/98213801954.pdfIn PDF document text
    • http://fabtur.ru/upload/files/58410541211.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/25818909633.pdfIn PDF document text
    • http://mqskin.com/luutru/files/15891263398.pdfIn PDF document text
    • http://liyangah.com/Upload/file/59172398833.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/4265554828.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/taxafilenarebo.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210629191406.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/08-27-20-34-51-16.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3f385e195e---kilagosasobazariwam.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607095bb3e02f---29979629562.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/2ce432e706a64037eae5de8169dedbcf/rimakonovafobe.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/52296189268.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/1bc22bf175a232f81a39f6efbfae3be7/14993571645.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/73624a88970ae49f2b4500126958ab6b/91534199953.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c77eb8eeb8f---31834997573.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e663caf6b3a69b79f92ec3a445c52a7f/96115684665.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/37f299726b150e4b2cd5b8160fa518cc/6771064744.pdfIn PDF document text

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