Malicious PDF — malware analysis report

Static analysis result for SHA-256 450eb52bd09df752…

MALICIOUS

PDF

119.3 KB Created: 2021-05-03 11:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 03c5a466b80a6f93586f189157656506 SHA-1: da590c36e2fe34bb1ea0d14a86079416399bf8b0 SHA-256: 450eb52bd09df752cdb0c485ebd2778d765372e079e50f6c0820c0c73e3c6020
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many pointing to disposable domains and Weebly-hosted files, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://baarspo.ru/strik?utm_term=at%2526t+-+el51203+dect+6.0+expandable+cordless+phone+system+manual PDF link annotation
    • https://tituwuvosaladu.weebly.com/uploads/1/3/4/8/134849885/9255773.pdfIn PDF document text
    • http://ttttrrrr.space/how_does_the_doctor_account_for_lady_macbeths_behaviorc1l6y.pdfIn PDF document text
    • https://pufodafu.weebly.com/uploads/1/3/5/9/135959320/noxewolanepe-gofibel-medimiguv-bebuxavowax.pdfIn PDF document text
    • https://xegavepixax.weebly.com/uploads/1/3/1/4/131452872/zesiw.pdfIn PDF document text
    • https://torufiwatus.weebly.com/uploads/1/3/5/3/135312416/domutat.pdfIn PDF document text
    • http://monstergym.ru/fokewipidoza69xyn.pdfIn PDF document text
    • https://sitimewodojex.weebly.com/uploads/1/3/1/8/131856527/jirofadoj.pdfIn PDF document text
    • https://buvedanazifom.weebly.com/uploads/1/3/4/8/134876279/lodewujo.pdfIn PDF document text
    • http://1xbet-football.fun/diono_radian_rxt_expiration_date_canadai3q5d.pdfIn PDF document text
    • http://leaninrzpd.site/heart_of_galaxy_horizons_shipsp711g.pdfIn PDF document text
    • https://rofofomigedug.weebly.com/uploads/1/3/4/4/134486696/tinedukoveg.pdfIn PDF document text
    • https://noremovex.weebly.com/uploads/1/3/4/8/134883944/6883346.pdfIn PDF document text
    • https://mizunemaki.weebly.com/uploads/1/3/4/8/134850414/4164834.pdfIn PDF document text
    • https://jaduxopedarev.weebly.com/uploads/1/3/4/7/134749363/nowolojofox-meliru.pdfIn PDF document text
    • http://evromotors.net/niwiwijozujolukonaxibewi6a5h6.pdfIn PDF document text
    • https://gorofegi.weebly.com/uploads/1/3/4/4/134462705/7c781b82244840c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_905901d2e2a0491a99840de854743ed4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusori/what_does_f21_mean_on_bosch_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/how_did_the_internal_combustion_engine_impact_society.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_897ed7c9072e4de1a8e1b01cf95bd220.pdf?index=trueIn PDF document text
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_22554f6ebf56454ca4a3c289d6e48cf0.pdf?index=trueIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_4176b517996446818d07227f17510e27.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14826 7260 bytes
SHA-256: 3265b570b7d2b40a5c7e1b95ae9dd6107c3bc5a06799cae2d7a832cdf02a203a
font_01_sfnt_off000160ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160EC 4144 bytes
SHA-256: fc02dd8945052924da689f24daa8249a6b0a5d6ddc2ca787317cb0ae9dcccdfd
font_02_sfnt_off00016f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F0E 22244 bytes
SHA-256: a892b9dabef3fbc3973ec1437aa6c5433102ad4da552fad611f9d54e960943e0
font_03_sfnt_off0001af4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF4E 19384 bytes
SHA-256: 6c15c9edb4f19ee1654e2d5a04ff14c62b009f5a2532f56191b10ed7429853f5

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