Malicious PDF — malware analysis report

Static analysis result for SHA-256 9297eb7f19dbb65e…

MALICIOUS

PDF

68.4 KB Created: 2021-05-21 20:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc9438189eb56bbfcdf9b2c39bbaaac1 SHA-1: c9d9b82c072089c09429fb33eee37d8024c31784 SHA-256: 9297eb7f19dbb65ed7c1ebcba076e97ce7ae2b6361e2135d575023e3c1434024
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8336

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://oniceh.ru/uplcv?utm_term=template+hotspot+mikrotik+responsive+gratis
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ddf289c05a---89908558961.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a56a558c4---zekarezilexenibuk.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7ce6b4864---lijexi.pdf
    • http://lumieretvie.com/userfiles/file/2216150709.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0c9164fc3---66304017725.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/32b2cbf64de053c0a2cdbbfffc2716b2/48902034195.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609546a30afd9---fevarigomagapiviniw.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609d002bf1a58---puwejagotetowon.pdf
    • http://alliusie.com/userfiles/file/wijalutulizu.pdf
    • http://www.abcklima.hu//data/editorfile/94924822035.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16091a7f1ed79e---ralaturanirisevuxazon.pdf
    • http://k-yoga.org/file_upload/spaw_upload/file/20210506023958.pdf
    • https://walkandsmile.com/userfiles/file/3177605737.pdf
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608120fe7dcd6---jebew.pdf
    • http://beautybybelief.com/admin/images/file/paxogi.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/9d0910360ed436cf2f43381a00f26448/guxizofepazenusozoge.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160841afe91e2f---83182217534.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e147.bin
3b8480d76e560eb7267131ecf2e67e0a5933e8e8e24437c94acfbef55a446c2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE147 5308 bytes

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