Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d29b6b1da3dcdcc…

MALICIOUS

PDF

71.0 KB Created: 2021-09-10 10:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 39ed1bc847195ddb665037fb61cc882c SHA-1: 08388376c9bb4ea26cae5373b6fe85df69ea7036 SHA-256: 6d29b6b1da3dcdcced33300d588e7265b4c9cb703aa260cb5dd57e45c33f7119
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://freeware-software-download.de/uploads/editor/file/dofuwazepemezi.pdf In PDF document text
    • http://x-site.by/upload/editor/files/zafexavib.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/65783930429.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/wodexemirabawakege.pdfIn PDF document text
    • http://vatlieulamnha.com/media/ftp/file/63606957510.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/4808412533.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/sovasigepavokewaket.pdfIn PDF document text
    • http://mojahotels.com/ckfinder/userfiles/files/vodagafodekawame.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/konajabitumifoxumeri.pdfIn PDF document text
    • http://xnucleus.com/members/member_images/files/71167826054.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/kabutoxuzazuzaroxebego.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/12673365877.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/rinalojodakigibitezedumin.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/tixofogilazujej.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/41819879688.pdfIn PDF document text
    • http://th-hl.com///upload/files/76860116439.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/34358328815.pdfIn PDF document text
    • http://jinyezi.cn/upload/bixojotisid.pdfIn PDF document text
    • https://izr.fr/files/lewinamamubaxemut.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/63700455156.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16131e27564c90---48679430325.pdfIn PDF document text
    • https://emtracing.net/userfiles/file/72911000538.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/57579880528.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=to+ride+a+silver+broomstick+free+pdfPDF link annotation
    • 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_off0000b3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D2 10936 bytes
SHA-256: 523e6669c0ac46c2464d2e9127fa89ff64c340271098c7bfed447705bca92006
font_01_sfnt_off0000cd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD03 16172 bytes
SHA-256: 2105179d8472caf19017a98ad0e05774fff2512cdaa3e7f56898d4e57c542611
font_02_sfnt_off0000f672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF672 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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