Malicious PDF — malware analysis report

Static analysis result for SHA-256 467db5401d4d0151…

MALICIOUS

PDF

77.5 KB Created: 2021-03-16 23:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 88e7625f98601d47d4d9906e28ff1034 SHA-1: 280f112dc0de2b420c7c7c24589c921768506454 SHA-256: 467db5401d4d0151742082094c3fd9f9d16b1fdc53e80466b2627766ee1e4762
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 0.9998

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=hot+spring+portable+spa+not+heating PDF link annotation
    • https://sabiwivilo.weebly.com/uploads/1/3/4/3/134316676/punedulewu-korajasawapusa-saselipej-laroxurisaba.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/what_is_the_best_age_to_have_plastic_surgery.pdfIn PDF document text
    • http://potenciy.xyz/178470079872py1o.pdfIn PDF document text
    • http://golosa-spasibo.ru/midanojoxogepowobukelxdpen.pdfIn PDF document text
    • http://enots.space/twilight_midnight_sun_movie_2020_release_date_in_india1hcjf.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/reasoning_backwards.pdfIn PDF document text
    • https://razivejinizefid.weebly.com/uploads/1/3/4/6/134610508/d4700.pdfIn PDF document text
    • https://cdn.sqhk.co/ganinidunop/MgejdYK/rutimibapukixipejokos.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/7Fhcjff/wizogajizetowanex.pdfIn PDF document text
    • https://cdn.sqhk.co/zewezerezi/1IjA1m8/free_slots_bonus_no_deposit_uk.pdfIn PDF document text
    • http://websporizle3.com/ubee_ddw36c_bridge_moded7you.pdfIn PDF document text
    • http://alexandreablog.com/juvakunakubaxp9er8.pdfIn PDF document text
    • http://miwasigal.mywebcommunity.org/pivuvaxipapurisa.pdfIn PDF document text
    • https://jebilazi.weebly.com/uploads/1/3/1/8/131856389/jijumolo.pdfIn PDF document text
    • http://justamorem.com/5248059496373wsi.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/drawing_vectors_physics_worksheetw5wqf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xiwozoget.atwebpages.com/what_is_the_effect_of_germination_on_the_rate_of_cellular_respiration_in_peas.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/76980596951.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_off0000f2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EB 5184 bytes
SHA-256: 5b887ef101da5cd1d9af0da704b8e3b6fc8be2a9a11d7a07678fce418aa32c7c
font_01_sfnt_off0001047a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047A 10576 bytes
SHA-256: 2aa431b058d2eef0bfa3b120e45c7304ada52f9fa815361a6074cc2d3f948d7f