Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0e538d981f85a6…

MALICIOUS

PDF

76.1 KB Created: 2021-02-15 01:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a92b66c41a91dd8cfc53c7f91a13dbda SHA-1: 697b5dd1e4c8439348bf0a7faf9fb911ec22df8f SHA-256: 0d0e538d981f85a615091dbc28392bd874c0775f9878e70c0af8b4021e8cb721
126 Risk Score

Malware Insights

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

The PDF 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 disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/wb?keyword=amit%20kaushik%20all%20dj%20song PDF link annotation
    • http://nakrutkavk.site/zepodelomoloxuvuzqppt.pdfIn PDF document text
    • http://probmake12.xyz/chronic_suppurative_otitis_media_treatment_guidelinesfo58i.pdfIn PDF document text
    • http://xeeewq.xyz/keep_the_ball_rolling_def3wu60.pdfIn PDF document text
    • http://winoraama.space/traditional_approach_capital_structure_theorylx0t6.pdfIn PDF document text
    • https://zetitazafoxiz.weebly.com/uploads/1/3/4/0/134040412/9159297.pdfIn PDF document text
    • https://livaganomin.weebly.com/uploads/1/3/4/3/134399079/vemuke.pdfIn PDF document text
    • http://gprofights.ru/miwokale1cdru.pdfIn PDF document text
    • http://all-casino.xyz/606710637718ew0e.pdfIn PDF document text
    • http://sexesex.site/pocket_rocket_bikes_amazonbbyfh.pdfIn PDF document text
    • http://wdd13.ru/31663322445rbal.pdfIn PDF document text
    • https://tusaluzope.weebly.com/uploads/1/3/4/3/134374665/bd6255.pdfIn PDF document text
    • http://unlockdeals.shop/background_remover_app_free0zvfg.pdfIn PDF document text
    • http://regvoolkim.website/normas_de_auditoria_generalmente_acew0u65.pdfIn PDF document text
    • https://gimisezijumini.weebly.com/uploads/1/3/1/4/131453276/firax_xenus_fulivowidazozin_dedipotifomuzi.pdfIn PDF document text
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/3930573.pdfIn PDF document text
    • http://eu-study.ru/4889809568407w1j.pdfIn PDF document text
    • http://55571.ru/orthographic_projection_tutorialw7n6g.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/wakuzidi/4951394095.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/autocad_free_trial_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/92543200568.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/34594318249.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E1 5272 bytes
SHA-256: 8d834882808fa7e8a007a4de7a018d6f430543cafce3f71ce8252712b252f50d
font_01_sfnt_off0000d8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A7 2116 bytes
SHA-256: 1f756b46481ac718095810e133e155ec1caf818687d25c20e8b002f727d713c7
font_02_sfnt_off0000e252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE252 9996 bytes
SHA-256: 074afb5f09bfcee1b9086c5834a08da32149f1179d1b3c5f2c8673e61f890dcb
font_03_sfnt_off000104d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D6 18776 bytes
SHA-256: ddb88cdf88741254f6a000dc9edf89cd3e9894d4d7ab24f61aff252b0a77214a

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