Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e254bc0591e41cd…

MALICIOUS

PDF

81.7 KB Created: 2021-09-20 15:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a950e30e33da646cce12a0c75887a808 SHA-1: 467701edbbf2df7b0e6a45d82c2a14f42822065d SHA-256: 0e254bc0591e41cd433aa024bcb6ade470c490d8ee1d2ab50dffc55412da0e37
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting it acts as a lure or redirector. The PDF structure and embedded content are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://crewmak.ru/uplcv?utm_term=android+auto+apps+compatible PDF link annotation
    • http://ambulanceservice.pl/userfiles/file/vosiretij.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/xuruvulowalat.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/jujexinexubofud.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/55690407576.pdfIn PDF document text
    • https://mavibusiness.it/file/14475925925.pdfIn PDF document text
    • http://koutingchina.com/upload/files/tupobaluvejuvokejuxet.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/26655647639.pdfIn PDF document text
    • https://haidangpc.com/contents/files/bovokipubezojojutikej.pdfIn PDF document text
    • http://modulobase.com/userfiles/file/gajusawokibisokesusego.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/59892795729.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/pidadurivilajofu.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/kogewuxababiwosaxojawiv.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/desasonukemowoni.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/99250797990.pdfIn PDF document text
    • http://samwha.com/upload/userfiles/file/98545058958.pdfIn PDF document text
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/91351214248.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/jibubivuzado.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/161462339e878d---36114642468.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/cq23re0kr4hpk72qv9olk51kgd/sovudisopaxitezeniberix.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///nijigewisajojiga.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/78158591875.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_off0000dbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCE 10896 bytes
SHA-256: 936811e4753561217ed6cb18ae2313ddd2a58c82a3320413fdd110973438cdc5
font_01_sfnt_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 17084 bytes
SHA-256: e525a728a1ac80b72f1606e2d7410072dad5ea5354a64faf9a211e804a2cf6bc
font_02_sfnt_off000120eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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