Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0755ad78e5d1da9…

MALICIOUS

PDF

75.3 KB Created: 2021-04-25 05:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2f9c4f4a7891936955f50857167542a6 SHA-1: 56c4d7f850da647f18f0e21307a459cae4dc113c SHA-256: c0755ad78e5d1da9144d655c8b4b83e736dca6b342ea462b647665b1b439449d
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 0.9992

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://ponafet.ru/strik?utm_term=joke+book+for+5+year+old+boy PDF link annotation
    • http://fanisore.sportsontheweb.net/41195957403.pdfIn PDF document text
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/2309602.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/jhRShaf/pixikavegixukobuguno.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/dnTY0ic/automotive_cable_wire_tracker_short_and_open_finder.pdfIn PDF document text
    • http://salea.site/3711617157834fan.pdfIn PDF document text
    • http://podeves.xyz/6862686129dzqak.pdfIn PDF document text
    • https://lavupujewefi.weebly.com/uploads/1/3/4/6/134631736/9946440.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/ihOwTAx/gagogonujakosa.pdfIn PDF document text
    • http://peteferix.mypressonline.com/civic_2020_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/bajowekununa/Tidiije/73552595050.pdfIn PDF document text
    • http://prostosite.site/comptia_security_sy0-501_exam_crampl7jw.pdfIn PDF document text
    • http://useraisins.pro/how_to_reprogram_garage_door_remote_craftsman9cwax.pdfIn PDF document text
    • https://vulodimov.weebly.com/uploads/1/3/4/8/134880101/2326364.pdfIn PDF document text
    • https://xipijixulureju.weebly.com/uploads/1/3/4/3/134377958/df7a83ad.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/79506586599.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://butaxogusevi.epizy.com/24002903417.pdfIn PDF document text
    • http://budejigejemuje.rf.gd/aliments_riches_en_fibres.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/javascript_dom_tutorial_download.pdfIn PDF document text
    • http://kabemetuva.rf.gd/84657154723.pdfIn PDF document text
    • http://voniziveput.rf.gd/losing_isaiah_book_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/comparison_degree_worksheet.pdfIn PDF document text
    • http://taxupot.rf.gd/most_important_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/almighty_god_idle_clicker_apk_mod.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_off0000e7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B6 5140 bytes
SHA-256: 5afdb26f76d6eb22d6aee7853d902b7f7268e15c95c01f99dd8b17b318be3e63
font_01_sfnt_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 11236 bytes
SHA-256: ccb81b5ca6c66a63bbd1927233f16d3dd749c381a142b3c80ed2858146c4a80b

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