Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d5145168a87dd8…

MALICIOUS

PDF

75.0 KB Created: 2021-03-07 14:19:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5a8d387f43dad4e896283f63dfa4df41 SHA-1: 66931407b20e57978d34d50b1d842c2ce08c678e SHA-256: 60d5145168a87dd8cf01863eb42795775a714bb91e02645a53f35516060f2233
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing/trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to obscure malicious intent or distribute phishing content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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+prime+a+renova+zero+pod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470222/normal_603fbc99c1432.pdfIn PDF document text
    • http://feedbacrnz.space/66623691348mwcpt.pdfIn PDF document text
    • http://pl50off.info/civilization_3_for_androidskcva.pdfIn PDF document text
    • http://kozlo.space/madewell_size_guide_petiteifxdd.pdfIn PDF document text
    • http://wacc-cat.org/how_to_crochet_a_blanket_with_two_colors_for_beginners7jjgq.pdfIn PDF document text
    • http://lavka-karamel.ru/28867396125qghuf.pdfIn PDF document text
    • http://wepovak.iblogger.org/27676864635.pdfIn PDF document text
    • http://nesobaka9.xyz/ferideripawofixvsrwr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_6017119a7ead2.pdfIn PDF document text
    • http://dressnbuy.com/margin_of_safety_business_advantagesrzl99.pdfIn PDF document text
    • http://sanegofelofut.22web.org/92146385865.pdfIn PDF document text
    • http://ledy66.net/684635583591mc5j.pdfIn PDF document text
    • http://maewallace.com/define_attraction_in_psychologypif6g.pdfIn PDF document text
    • http://heliusdesign.ru/advertising_and_integrated_brand_projnbn5.pdfIn PDF document text
    • http://rewita.fun/361977878277pt9i.pdfIn PDF document text
    • http://getdouche.xyz/wetutojurozokiremejj2qr5.pdfIn PDF document text
    • http://shopsupergood.site/razer_blackwidow_ultimate_blue_switcheswonqs.pdfIn PDF document text
    • http://circleshtang.xyz/beautiful_creatures_full_movie_sub_indo5apjz.pdfIn PDF document text
    • http://makedctl.site/inetsolv_core_java_material9qhlq.pdfIn PDF document text
    • http://lozotago.iblogger.org/cheung_kong_holdings_limited_annual_report.pdfIn PDF document text
    • http://kafikiwamavo.22web.org/jasprit_bumrah_image.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_off0000e44e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44E 5060 bytes
SHA-256: 2b6fb3d968262f6d32a3dd873f7d22312ef0b0ef1674e7c3803dcf1443291e81
font_01_sfnt_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 12360 bytes
SHA-256: 3f527aad506e141f3080fb01ed8ed819490153bfad559b33f23a4e9aa3799dc7

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