Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc125084f162236…

MALICIOUS

PDF

68.7 KB Created: 2021-09-29 13:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e9523049e858919435b1bf298c6e1149 SHA-1: efaadaaee928d5f2007501ed9dac37e9ba6111f5 SHA-256: 6bc125084f16223620fa8dfb966d15a69d6e7d0faa0086e8182d2f0e802beac4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous external URIs, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://coretry.ru/uplcv?utm_term=tank+recon+3d+full+version+free+download+for+android PDF link annotation
    • http://sampoernastrategic.com/uploads/image/files/53318456705.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/xofanigadujado.pdfIn PDF document text
    • https://topconta.ro/userfiles/file/18129926287.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/50858762629.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/hpn0uha4tk4do6fi1m8e1fkjj0/mejupilogudebo.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/jivuweput.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/simatez.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/80715836181.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/lebapaginisamuzovizamudul.pdfIn PDF document text
    • https://ptogel1.com/contents/files/40678445414.pdfIn PDF document text
    • http://artemon.nl/userfiles/file/85844111014.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/gemovajipiwotevubima.pdfIn PDF document text
    • http://potya.com/66523871693.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/49845611328.pdfIn PDF document text
    • http://synergyproperty.com/images/files/74021536207.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/bizofomofawikipifesu.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/lanobu.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/44120380546.pdfIn PDF document text
    • http://rayer.cn/d/files/dokadinomoxusufanu.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142409b71986---49665900118.pdfIn PDF document text
    • http://candientuvibra.com/images/file/jisezudilivulagagopew.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/11600164645.pdfIn PDF document text
    • http://artgrafika.cz/userfiles/file/garasanopadesu.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_off0000ac46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC46 14820 bytes
SHA-256: 6b4d918eda3b5cb70ba12001badc7da7f9b920005fbeb20fa005dd438e33ecfc
font_01_sfnt_off0000d187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD187 10848 bytes
SHA-256: 8f1413d59f134e125b4fca99b0cb309fbc774fe19b7cbb1e2695b93f97c4ae34
font_02_sfnt_off0000ead3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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