Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2a67f62d7c94ee…

MALICIOUS

PDF

78.3 KB Created: 2021-03-19 21:42:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 1d861bac1e4b8574a20a2c5e9bb44353 SHA-1: 740c0984c9433c2fab56da9c9aade4f800ed8a82 SHA-256: 6c2a67f62d7c94ee8f5f191a4a9f7d892150a7dd1e89254e2d7dae2fe3081c22
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains and configured as a link farm, suggesting a phishing or malware distribution scheme. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags this behavior.

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://zajinet.ru/strik?utm_term=how+to+be+happy+step+by+step PDF link annotation
    • https://nogulumu.weebly.com/uploads/1/3/4/4/134476008/dekupozat.pdfIn PDF document text
    • http://amorexpo.com/rest_api_web_service_example_cyu0uz.pdfIn PDF document text
    • https://jupimoxojufe.weebly.com/uploads/1/3/4/8/134860775/lebilazabijagametubi.pdfIn PDF document text
    • http://xufuxenu.mypressonline.com/vavumagonakalad.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/4hgbNk3/download_video_twitter_app_android.pdfIn PDF document text
    • http://termometr-medikal.site/can_i_use_android_apps_on_chromebook1tsql.pdfIn PDF document text
    • http://jabewes.medianewsonline.com/xalolewikitofavuwol.pdfIn PDF document text
    • https://cdn.sqhk.co/retirijozi/tujcia1/64996216204.pdfIn PDF document text
    • http://dejepuzalew.mygamesonline.org/vukarevufejibefufoxogubiw.pdfIn PDF document text
    • http://raifaisentgo.online/12045261848cy33i.pdfIn PDF document text
    • http://dezimazokuxulil.mygamesonline.org/analista_de_negocios.pdfIn PDF document text
    • https://cdn.sqhk.co/gepibilis/hchfijy/7980671418.pdfIn PDF document text
    • http://mukinokelek.mygamesonline.org/99855686589.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/64554158297.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/call_keeps_stopping_alcatel.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/jb0ctsN/76920202827.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuluxewamotate.atwebpages.com/wubepodukud.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_off0000f47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47B 5072 bytes
SHA-256: 80533ec7254dff7a654f58df74cad0d834343d0d15b4eab77621616cb1da096f
font_01_sfnt_off000105ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CA 11324 bytes
SHA-256: 7dcf484e3b98ab8e0be90c04ff247aebba0cae569ded3fb7611c5da2943b1ebd

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