Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e54efb5c8dd497…

MALICIOUS

PDF

62.0 KB Created: 2021-09-04 07:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 25cd94157f77b7ad416218b949407ebf SHA-1: 7ec9b3c65a06938604919f5d417a57224fef4524 SHA-256: 58e54efb5c8dd4979c51fe68fa944c925175548da4674b314fd1b6ce7dd600d8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5895

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://gat-asset.com/CKEdit/upload/files/bozum.pdf In PDF document text
    • http://www.agenbenangbandung.net/file/28747902490.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/28nc5ja23j8q8kosjp8jqhv824/mamemedomorinomurebid.pdfIn PDF document text
    • http://dyweisheng.com/uploadfile/file/2021072414511473499.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210904121631.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/v79an8csigaffg7ofi228ctt2t/81301157658.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/19htfr1vobeme6i4cisg3jktb8/65851825802.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c433cdd55bf---2957347730.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/52607720346.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/87653123360.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/wetisematoxetowemif.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/linopikebexa.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/695d139acb1474b9b83b2d8833ccac52/36729772648.pdfIn PDF document text
    • https://x-software.cz/data/file/birefezamiwo.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/4782c25b148233fd853b0d578d53456c/wepugeduxu.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/95547435784.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4b0771345---voliw.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/5725b2318c9f3c337da6b8e9bda37430/94993587076.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/fd35c571865fab1dedfc4a7e94cf8803/wepirasoz.pdfIn PDF document text
    • http://beulahcooleycollection.com/clients/870349/File/45855712186.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/0c92b9e190655bc75024390147956512/57579079734.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/fa981a196a2f9e40c92a6545f0d0f33f/vuzuzajut.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210531123732820831348.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=generation+of+computer+1st+to+5th+pdf+downloadPDF link annotation

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