Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddfc06ed38a6a45…

MALICIOUS

PDF

141.2 KB Created: 2021-02-20 01:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ba281e587a56adbfa763d9201fc76a63 SHA-1: f4a45d0873fae8b4ed9a1fbcc7c83b83d68ee1e9 SHA-256: 6ddfc06ed38a6a45c7a8cad44bf49b86994a963729eba52ef5d2390190f0d5bc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content, likely as part of a phishing campaign or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=torah+holy+book+in+english PDF link annotation
    • https://cdn.sqhk.co/zubavagi/DijKigc/f1_racing_hoverboard_dope_or_nope.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404313/normal_5fd6752076fba.pdfIn PDF document text
    • https://cdn.sqhk.co/wafasojudo/jjjcbiw/rummikub_board_game_how_to_play.pdfIn PDF document text
    • https://cdn.sqhk.co/riroxale/gjaH67W/kesosono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_601bdff701d54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392868/normal_5ffeb7bfe0649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385028/normal_6011a5efc0d4a.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/jcTsjc0/48471807828.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484612/normal_6005cedd444a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445889/normal_5fca0a38e2771.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/hfViaYu/23079766834.pdfIn PDF document text
    • https://farisogu.weebly.com/uploads/1/3/4/3/134307724/petosabosepob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_600f832a6431f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426277/normal_600738d67dd8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/vadibuj.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/capteur_de_position__effet_hall.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/louisiana_catahoula_leopard_dog_information.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://scripts.sil.org/OFLIn 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_off0001c6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6B2 5200 bytes
SHA-256: a80bea817bed95e716693aa9f508be778fee2672717d97fbba34442758d88564
font_01_sfnt_off0001d869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D869 18080 bytes
SHA-256: 733d89663c791c480ddad96cd2a814d1277483ab371a02d52ec945169c41301a
font_02_sfnt_off00020fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20FCD 16232 bytes
SHA-256: 2a5506dafc5ec38ea7f782d960d9e1d4cebb1b0c69748b4f764a76eba98fa4d4

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