Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a6d94372640cad…

MALICIOUS

PDF

72.7 KB Created: 2021-02-21 18:52:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: cc62b33bc246c0f5ae41677ef55c80ba SHA-1: 77b4cd2f8a053cbf465be72541ed4955377fc04f SHA-256: 48a6d94372640cad3b61a1fb7b8b105b5a99b49d566e620b37a326dbf6c0ac17
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=minecraft+guide+to+survival+pdf PDF link annotation
    • https://cdn.sqhk.co/lakivasulis/a7u8iah/mad_gunz_shooting_games_online_battle_royale.pdfIn PDF document text
    • https://rowexajezer.weebly.com/uploads/1/3/0/7/130776500/0e1e78e6cfb.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/3jfjihM/zonabuwijizalipogekak.pdfIn PDF document text
    • http://labiosdewonda.com/dujalalamo6zu1j.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/jhSzTif/the_very_best_of_the_eagles_cd_songs.pdfIn PDF document text
    • https://lafadulow.weebly.com/uploads/1/3/4/5/134591129/vewapufekopa_ganitixinuririm_punapanixisu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379374/normal_5ff773caaad48.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/jajcgcr/little_sisters_bookstore_v._canada.pdfIn PDF document text
    • http://love-cosmetics.shop/kindle_model_d01100_review5c7af.pdfIn PDF document text
    • http://contact-git.top/electric_field_simulation_answers_brainlyat0m8.pdfIn PDF document text
    • https://piwupibuzidiki.weebly.com/uploads/1/3/0/7/130739867/gikadomekarowowotek.pdfIn PDF document text
    • https://lerekisisag.weebly.com/uploads/1/3/1/4/131408666/zederura-fitawokoj.pdfIn PDF document text
    • https://luxufaxunixepu.weebly.com/uploads/1/3/4/5/134584211/d2982.pdfIn PDF document text
    • https://vamalogobiw.weebly.com/uploads/1/3/4/6/134696595/36db5fe.pdfIn PDF document text
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/jised_bifugimoxaximuf_topemeleget_vagovogarup.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/KhgMwjg/29678488404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445731/normal_6014742abdf85.pdfIn PDF document text
    • https://cdn.sqhk.co/venitalobeni/gjNLugi/warfighting_functions_mission_command.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452846/normal_5fd76dbbded2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF93 5388 bytes
SHA-256: d4a00ad26a8640b515a41ad709f5b0865a1206f9e081b5c54cae82d1ebf6ad50
font_01_sfnt_off0000f20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20F 10352 bytes
SHA-256: 2a226ff1b2d34c658ab3201b04eab2b292051bda4e1e431301f81bc7d398a465