Malicious PDF — malware analysis report

Static analysis result for SHA-256 530dd5f68f6a9242…

MALICIOUS

PDF

68.1 KB Created: 2021-05-10 08:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15189037fbbfdb027a6dfda7d8dc0d95 SHA-1: 7fc6f901e219d4f471cb2109a405b4d103eca42b SHA-256: 530dd5f68f6a9242536a6d9aa3be6cbaa570fda5c5a72847c363a6c918fe2745
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8050

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160772bc25007d---15992431059.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/e8133febe216e946e18dc0865e1748cb/63272485570.pdf
    • https://baohohoanglong.com/userfiles/file/46401512312.pdf
    • http://aarogyamedico.com/userfiles/file/memomamafenotozazimomik.pdf
    • http://aquatrustfina.com/userfiles/file/tigojamusabadapolar.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16085a734dce7b---bupaf.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070701a4525d---xemomiseb.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8fd679fdf---wadupuratodupira.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607598157226e---raradosudidud.pdf
    • http://garderoba.sk/images/_file/ladexiremulibavet.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/39f42c7dc41c17ee82dd6fcf2ba95023/xedomewu.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081495b5af2d---jewutikalefikibom.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/3215654589857d575c163676c7712728/gakefux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=beethoven+1992+full+movie
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607399c0e5e19---38048741123.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb22.bin
e363d137d66969c9b231569877785820470aab974d26fb3733d4dc243ccfdd49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB22 4972 bytes

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