Malicious PDF — malware analysis report

Static analysis result for SHA-256 140f4e071df77b4a…

MALICIOUS

PDF

112.0 KB Created: 2021-09-17 03:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6e1e2a06788499374bb440001bd638ce SHA-1: 879509042dfbfffcd03b819a38a1fc60863deebd SHA-256: 140f4e071df77b4af1a47e0395a345650e78864f8d669f5aab4402149a766316
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised CMS uploads or disposable hosting, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6795

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://drafthe.ru/uplcv?utm_term=android+auto+screen+mirror+no+root
    • https://imaggu.com/ci/userfiles/files/dalerogavokefojivijugo.pdf
    • http://navrattan.co/userfiles/file/79540833132.pdf
    • http://stylekd.ru/files/57943342401.pdf
    • http://micdelhi.in/userfiles/file/putijizaneravum.pdf
    • https://west-holding.com/userfiles/file/19579375604.pdf
    • https://dancleland.com/img/upload/file/30712561369.pdf
    • http://fkhd.cz/data/img/wabumemijekukopol.pdf
    • http://studiobardinisrl.com/userfiles/files/64411585908.pdf
    • https://ladangmimpi2.com/contents/files/wekenowekuw.pdf
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/kalapiz.pdf
    • http://cuboni.com/uploadfile/hong202109080414488222.pdf
    • http://holland-ex.com/images/blog/file/61973907565.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16131dda34a7c1---56835665190.pdf
    • https://commonlawhouse.in/userfiles/file/23966035563.pdf
    • http://vibestedu.com/_UploadFile/Images/file/35839847601.pdf
    • http://bachtungcompany.com/upload/files/pixowibabazex.pdf
    • http://lamexmarket.com/uploads/files/94700786780.pdf
    • http://hoilhpnqbthanh.com/upload/file/96791120617.pdf
    • http://shinies.ru/img/lib/file/94773034915.pdf
    • http://thaihotelsale.com/FileData/ckfinder/files/20210910_C3A1CA938B8BF16B.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/kbs2f8e4oc18aarebh8c6dijrb/62857091674.pdf
    • https://pavillonwohlen.ch/userfiles/files/dijafuvefinifilab.pdf
    • http://scro.ru/pic/file/sikisis.pdf
    • http://sakuragiramenandsushi.com/uploads/files/bojideleja.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/uice1gumpusc7uu83ug6k4f4em/89499222056.pdf
    • http://arcstema.com/userfiles/files/85303733500.pdf
    • http://jshtextile.com/UserFiles/file///11226232134.pdf

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