Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b67b82150ffb671…

MALICIOUS

PDF

63.7 KB Created: 2021-07-14 01:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: cf71dcf9b052b32335f3f1b464ba7318 SHA-1: b5e2f7ec13e9031517622af692277549fcad0aca SHA-256: 4b67b82150ffb671a9d7389b3a82384baff93101b0356027990e5e143f34a2df
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5089

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 http://xaydungphongphu.com/uploads/files/rivumiranu.pdf In PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d70d6b7ab72---mibasupot.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/54487fcd79a25426a424a19f23f583c1/sowogarus.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/74648499907.pdfIn PDF document text
    • http://elma1.ru/!upload/files/95423530284.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/bataruvipojosu.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e72642bad4---nakiwevige.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/abe037dff5723533178e58beb6ed2ae9/zexoboniwe.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/temobemok.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a95c570f5---94612621679.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/bonojoxiwafajajawejis.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/a1b836f4f9e9ec3f691638c2279f2229/nutiwozekanibafajobajaser.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/d1eb95e63d76483f8225e508a86134a6/lulesojelafize.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/12187064717.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/70276346936.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/61679688171.pdfIn PDF document text
    • http://markone-tools.com/upload/files/donogamarefunulipazimop.pdfIn PDF document text
    • https://lordpin.com/calisma2/files/uploads/3623002067.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/q1jh3vn97ftfdn6al2734r9vpr/xalexeteramed.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf258c09e48---43024819801.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/51f813359c4b1db0106af9e53ba83b37/82507891955.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/50669005896.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/bopisegofejaran.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=my+nose+burns+and+i+have+a+headachePDF link annotation

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