Malicious PDF — malware analysis report

Static analysis result for SHA-256 af4d2c46ebd2e911…

MALICIOUS

PDF

91.1 KB Created: 2021-03-01 01:05:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: dc9dba65a4c7168fc030d556e5882e80 SHA-1: 7e0a30ccc90b0729ac4cfbfe9ffc93559efef34a SHA-256: af4d2c46ebd2e911b15c2d1900820372ab6f86e0e7bb19f47af3f6bdb339c6b4
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The presence of embedded URLs suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=how+to+register+for+chartered+financial+analyst PDF link annotation
    • http://lixorajepidil.mygamesonline.org/warren_wiersbe_be_books.pdfIn PDF document text
    • http://cmbclientes.com/emiway_bantai_machayenge_video_song5y1kp.pdfIn PDF document text
    • https://cdn.sqhk.co/pedagukar/fXzjeha/mazekobudozitefituruwujut.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/hhqidP9/new_amazing_world_of_gumball_full_episodes_free.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/19613728736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495843/normal_5fd63cc7294dc.pdfIn PDF document text
    • https://gipofomodofomew.weebly.com/uploads/1/3/2/3/132303323/4234742.pdfIn PDF document text
    • https://dazuzidasepod.weebly.com/uploads/1/3/2/6/132681566/wavadixufobim_galenaporotiw.pdfIn PDF document text
    • http://mmamba.ru/baal_veer_returns_episode_27ny6r1.pdfIn PDF document text
    • http://pesale.pro/perdona_si_te_llamo_amor_pelicula_trailer_espaol_version_italiana0ztni.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/nabojex.pdfIn PDF document text
    • https://pemogele.weebly.com/uploads/1/3/5/3/135324676/3bc71473f644ed9.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/2065268053.pdfIn PDF document text
    • https://cdn.sqhk.co/pugusomimoro/b58ihKE/9593811878.pdfIn PDF document text
    • https://cdn.sqhk.co/xubodijixali/Ydjgjjh/slots_free_games_las_vegas.pdfIn PDF document text
    • https://jolewewovu.weebly.com/uploads/1/3/6/0/136087062/8027157.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/rexoropuvakodifinun.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/20328831089.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zejibanunepi.myartsonline.com/638464179.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001243d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243D 5436 bytes
SHA-256: 4e8e7fa1ccae70c924eb8b4370de25b4cea88664b14a9f65c2141fe00a4d367e
font_01_sfnt_off000136d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D0 12332 bytes
SHA-256: 665f96cce54e1798b6266e36ff533c15ed962cd1e1e8bee6f9b4af02149fb3f2

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