Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5a1de3c43c2cb6…

MALICIOUS

PDF

75.9 KB Created: 2021-02-22 22:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 882063d157a3d9bf068ca5d147288959 SHA-1: 614dac56201cf2b678ded7031d47f37bf9f071b8 SHA-256: 6d5a1de3c43c2cb64f0775a19d7898b0e5c78d7b6769533cf6a3af482b46535e
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 hosted on disposable domains, suggesting a link farm or SEO poisoning attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=pokemon+sword+guide+book+leak PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412908/normal_6006b0f0290e4.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/geXbnia/13458184246.pdfIn PDF document text
    • https://bujozimadepaxed.weebly.com/uploads/1/3/4/6/134615651/6031989.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/koxuk.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/g0kgjii/pen_and_paper_rpg_database.pdfIn PDF document text
    • https://cdn.sqhk.co/zekuxemelop/TjbRUie/jafikewijenuguvusezisazu.pdfIn PDF document text
    • https://cdn.sqhk.co/sowumavag/hVKgfQb/pinball_soccer_2018.pdfIn PDF document text
    • https://vokarojunez.weebly.com/uploads/1/3/2/6/132696330/zosuwiw.pdfIn PDF document text
    • http://avit0.cc/ikea_desk_legs_amazon4r4u0.pdfIn PDF document text
    • http://sacredname.ru/paper_origami_fortune_teller_templatetjt6b.pdfIn PDF document text
    • https://cdn.sqhk.co/vemoderama/sPIVhjg/chevy_silverado_stepside_bed_for_sale.pdfIn PDF document text
    • https://viluxesoxumubi.weebly.com/uploads/1/3/1/4/131406714/kokipoxuku_xurazodixudub_remameru_zuwaj.pdfIn PDF document text
    • http://soinjaga.ru/98959540024zxtzr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_6012083e74ce5.pdfIn PDF document text
    • http://kutefujuwusara.iblogger.org/realidades_3_workbook_answers_page_10.pdfIn PDF document text
    • https://cdn.sqhk.co/dizirajeb/gehgIif/84079855887.pdfIn PDF document text
    • http://kafojiv.iblogger.org/74341711572.pdfIn PDF document text
    • http://lnstagramcentre.net/70704009445es4py.pdfIn PDF document text
    • http://hook-up.fun/capital_structure_mba_project803ta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nunusama.rf.gd/for_christ_s_sake_2010.pdfIn PDF document text
    • http://notufexunu.rf.gd/62191214722.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3A 5244 bytes
SHA-256: 7da39e62f6eee220ffd7a289dbfe36eb8cca7373103ad602c71d51e62cc54db7
font_01_sfnt_off0000eef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF6 10852 bytes
SHA-256: 4103b77523a51c026ce13aef4d8b1beddf3a1b43cbec4b20ec63806bef51fb9b
font_02_sfnt_off00011417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11417 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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