Malicious PDF — malware analysis report

Static analysis result for SHA-256 092911c3d8df48fb…

MALICIOUS

PDF

78.2 KB Created: 2021-09-16 04:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 95314421f469414b6eff3a60dd721f62 SHA-1: 0db0a7273e83bedf645e21525b9270ce35628eb7 SHA-256: 092911c3d8df48fb7ff9efa0fef848d0657fa7b7d276be2323b2b615a8f11a84
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a strong intent to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, suggesting the document's primary purpose is to act as a deceptive gateway.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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://pixomot.ru/uplcv?utm_term=silence+of+the+lambs+full+movie+online+free PDF link annotation
    • https://mmgrowersg.com/ckfinder/userfiles/files/poxojorepekuz.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/nuvufagirin.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109031616157551.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/10609484333.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/58824965337.pdfIn PDF document text
    • http://hkacca.com/userfiles/fanuseledavexofuno.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/62122825714.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/mokepos.pdfIn PDF document text
    • http://zmiz.hr/userfiles/file/tesodovosubavur.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/13069903440.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/zotavovugidivanak.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/13406484200.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/litatulidim.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614272dc8604a---dixekaponomiguzav.pdfIn PDF document text
    • http://lulanjina.net/upload/files/soxovobolibulanezizetozu.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/pivifipobamujelusogo.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/77657771053.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/6594418817.pdfIn PDF document text
    • https://ciar.vn/uploads/image/files/78497860648.pdfIn PDF document text
    • http://mrukseo.pl/userfiles/file/67060558712.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/togagesaja.pdfIn PDF document text
    • https://knoxvilleremembers.com/media/jebinixu.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/4beb07fe38cfa349e9511e021660c380/40662451007.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/watajodetix.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_off0000ce23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE23 16780 bytes
SHA-256: 75df97bba74c493d006021356e58cdb07b32006d2242f702c761b6a786fb6ce7
font_01_sfnt_off0000f983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF983 10980 bytes
SHA-256: af408c7ab8e74d393c894ad3b7a4518c6b6341a198ddfb7c64de6270350603ff
font_02_sfnt_off000112cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1