Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1cb2e7190cfa340…

MALICIOUS

PDF

79.9 KB Created: 2021-09-07 21:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 994929a728844ea5d47f9a778b35f79c SHA-1: 9abd0c1f0f86a7d35b58b387988e0f1860effe10 SHA-256: e1cb2e7190cfa34039d2cc86dd951e868b1963c73f267799001fc670b5cfb7f0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure itself is indicative of a link farm used for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://philabc.ru/uplcv?utm_term=cuisinart+dlc+7+super+pro+instruction+manual PDF link annotation
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c2482f86834---talixobo.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608718501fd7e---46357755116.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/wiluvebebomerugova.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b31c22b83a8---lutoz.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/0e03e73cb2ea2ef28c33808a830848e7/75524271242.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/bubusososede.pdfIn PDF document text
    • https://oliogalanis.com/file/luragisewaxajizajubor.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/4984414e6c6db65e132fded7f38f195a/61491117782.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/1328614933.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847684ebc15---kuxuf.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/54104390619.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/6752911825.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160962ce616ab2---pegexurirunewat.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/2ceb21ad4121dd6c2b74267c131ac005/duzasasazeterunevoguzeje.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/vn63jadcnmoonufbg2rnhhl59r/68093461777.pdfIn PDF document text
    • http://penzionriverside.cz/files/file/morifuvejefosifaribotofu.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/nujenusowofemedojod.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081e9cd21684---85166495875.pdfIn PDF document text
    • https://ocbond.org/userfiles/files/danufawetadopovixapiz.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/pobamatamogutimoxag.pdfIn PDF document text
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/89698061956.pdfIn PDF document text
    • http://apartament-krokus.pl/userfiles/file/kedifadidigenorejof.pdfIn PDF document text
    • http://cortabellanews.com/userimages/65479817342.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d382ea5439---97749962465.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c5cde1d87---22620491028.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E0 16512 bytes
SHA-256: fa56423bff71a1f5b7da82e5c8aaca0689a797a197416962921f1f20cfcb3c0e
font_01_sfnt_off000100a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B7 10856 bytes
SHA-256: eaed3afd23d0649a2455d114a1769c2b470cfd8dd00734eda68d22bf4d973fe3