Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed2011d99983440…

MALICIOUS

PDF

88.3 KB Created: 2021-09-04 13:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b52e6475340aad4e8af2a72d26e138b1 SHA-1: 34cca11e5e28c114c94b600a93447d20439e1e4c SHA-256: eed2011d99983440954153f5bd2eb62bb1595777c7b9e716a272fbe8a5a756de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to websites hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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
  • 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://garglob.ru/uplcv?utm_term=english+funny+stories+book+pdf PDF link annotation
    • http://neurooperations.com/ckfinder/userfiles/files/togesefejebixegi.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/56f44a571623dca481c44f3e7bf5ab95/36765756435.pdfIn PDF document text
    • http://topas.lt/userfiles/file/nutenefotope.pdfIn PDF document text
    • http://fxmeat.com/upload/file/c529a634d02f167292c5949d4c4bcfc6.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/baladububojuzuraluban.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609beaed5b66d---xodobixidegidizokokar.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/30315611161.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/469c921c86e5379a082318edabc56894/79537020872.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/jutozuvalodetadarasiv.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607238d7b855a---44746113546.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/dowib.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/878oic01hchdt4bsnjucppcftj/50313154084.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/88519506941.pdfIn PDF document text
    • http://canoeing.by/pics/files/mepokasi.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/pejid.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/9144769890.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/78171962044.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/wokulagebofaxexuxuzifa.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/a177f285321dab9f50b354a3d63b8950/73986573228.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304c02d124e---zubuxewubexejojide.pdfIn PDF document text
    • http://clingac.es/d/files/16633918618.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/44242823835.pdfIn PDF document text
    • http://adbuffalony.com/uploads/files/kevidilamus.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/dupedawulalopo.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_off0000f2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FA 11044 bytes
SHA-256: d206c1cff26dbbf81927459b36e70069fbac2978096fe14a36cd66a129304d9a
font_01_sfnt_off00010c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12442 18548 bytes
SHA-256: cb1b6b78dd04aabca53cfb40c45acb5bd175209c99272edd91068daa972ac631

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