Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6945bf34343ccbe…

MALICIOUS

PDF

72.2 KB Created: 2021-06-19 11:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a214ffa686b2d6847bf8e89b458945a SHA-1: f8372a0828d34d7760be6d10510e56019ca786df SHA-256: e6945bf34343ccbeac02bd56aadcbac6186f31f8f0c9952d63e3365b71df48f5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9684

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://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec39e62683---37910808353.pdf
    • http://goldenbaycruisesagent.com/userfiles/file/79563307702.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/da1e4f03c5489dbd7f560986a471aeaa/51723501399.pdf
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/86466575805.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a28a64ceb15---jixajozapesodunu.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16089be658c4fa---mewomotazobolepu.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f9a002ee023fde4177023536e3fb2ebf/kedogewoxabov.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/bdpuosmre071rjl42s05ep6hj3/xurozupukexigadi.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160722e8aad694---863765878.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861897e96e2---22568860751.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16098aa583243e---76908602121.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47023c1624---58509533270.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/3ckpn99nfgkujof6ltsgsjrje4/murepijobowigeg.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07b3bafb6b---momemesonuvijozidu.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b89ada6f7f---zadijorewibewarora.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/v1gqgmmn8jq27vg4ugpelahda0/ligiwifuki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=sample+rubric+for+reflection+paper
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107c0.bin
09ed81ad29ecf7b15a6f13161acc4cdabe6a84be9d67b9f879abc9ccbc856f7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107C0 5228 bytes

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