Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbec29a6c2f2907d…

MALICIOUS

PDF

61.1 KB Created: 2021-05-07 08:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 594408373ee3d5f35b2954a93127954d SHA-1: d6cb09b6f545344596348ab149b53739a5c7eb3d SHA-256: fbec29a6c2f2907d03c41ec68bff30d32a71e0e32cd72f821f1196c94a018f26
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains a link farm pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8078

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://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/82qi54sn0onp8p3pcjpdp871j8/xifunu.pdf
    • https://amatnieks.com/pictures/image/vixuxafukewagenu.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed2069a934---23910334222.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df77dabc2a---zesubilakarilipisiw.pdf
    • http://alituncer.com/userfiles/file/wiramumofulererifexigaw.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082f9a42379f---vapizuzofurejujivavaxapa.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/80r6g2fn5s4f3k2md8ekpr0faf/97207101138.pdf
    • https://reinigungsfee007.de/wp-content/plugins/super-forms/uploads/php/files/3jtvtbdb82r7opj5s9u69tlorl/96403391424.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/6171746d7b082903ab1bff681dca91cb/33451067894.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/9cqbmpes6t43ju3nbha7tku9h6/70257419753.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c849de607---75717947570.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160773efce73e7---kubasi.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/efee740f26b57a080561a30e7045be0b/35559795432.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/47ac2af6019f20029ac3ee105c0f3a22/pimupidefepepikeko.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/12dcb11466880baa2fef081e3808c992/rinetubodejomasusiga.pdf
    • http://krevue.cz/UserFiles/File/25361142901.pdf
    • http://ahcxdq.com/uploads/file/282338424918.pdf
    • http://amon-syotengai.com/userfiles/file/20614302471.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ben+10+omniverse+video++tamil
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e55c.bin
b1726dc9e2cce3acab465d0e12b96cdf0b4d60564a86c27383cc0bdbdea399dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE55C 5060 bytes

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