Malicious PDF — malware analysis report

Static analysis result for SHA-256 647bc93a6da38fa5…

MALICIOUS

PDF

75.3 KB Created: 2021-03-27 22:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 266ab08d1d266308af6c9ffced57ea5e SHA-1: e603d8954d76b4db2a196b9fbd5172909956d942 SHA-256: 647bc93a6da38fa51f07139b7b7ad691af3ae4d502e0dd840d2300cd99f98f71
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The presence of the URL 'https://jumiwimov.ru/strik?utm_term=cyberpowerpc+hdmi+not+working' within the document body, combined with heuristics indicating a link farm and a ClamAV detection for 'Pdf.Phishing.Trojan', strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the overall structure points to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/strik?utm_term=cyberpowerpc+hdmi+not+working PDF link annotation
    • https://cdn.sqhk.co/dibirolinu/B6jfjdA/events_in_atlanta_ga_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/njeiijj/wozipu.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/f7ifOU2/homemade_chocolate_ice_cream_recipe_ice_cream_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/luzorisu/gcgiAvA/fegifijumebem.pdfIn PDF document text
    • https://razabajase.weebly.com/uploads/1/3/4/3/134355763/7342020.pdfIn PDF document text
    • https://monowulesamewul.weebly.com/uploads/1/3/2/6/132682048/6875896.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/jeuo4ha/86659696005.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/cbPAyij/laxipogiwetajo.pdfIn PDF document text
    • https://zonixaroponovan.weebly.com/uploads/1/3/1/3/131398400/2c03250478.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/redib.pdfIn PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/tevub.pdfIn PDF document text
    • https://cdn.sqhk.co/dofubetu/geggCii/walking_dead_season_11_cast.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tomaxade/queensland_corrective_services_annual_report_2017.pdfIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_92410f8e4f4c44739ccbf4ef3ca931a2.pdf?index=trueIn PDF document text
    • https://d4bcd744-2348-4fe3-9006-05b2fcbd3cbd.filesusr.com/ugd/704566_4a1013eb2df041b88e303c1c04f5dcfe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mubefula/is_inductive_bible_study_good.pdfIn PDF document text
    • https://26aaa629-0581-4e25-ae32-a194504e59ab.filesusr.com/ugd/2d4e87_1e4eb2793e334ddd80a830e3ff4481d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizaxo/pobetin.pdfIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_c30e2a8f400946ae80722b1b0509a595.pdf?index=trueIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_8e080f26f83a4b32a7069b2e089fa302.pdf?index=trueIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_1b28173b03d64361885de72f41565ef8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezorito/the_rules_of_the_game_of_life.pdfIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_1273d3068ec64c3eb06b9c699e47c9b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/small_envelope_template_printable.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_off0000e86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86D 5372 bytes
SHA-256: c78aceb0cbf061843b1b88e5bbd9e4cd53b565ec988f1879754f835fc2be10dd
font_01_sfnt_off0000fa96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA96 10844 bytes
SHA-256: e09a9c1cb34719f1f29804f54de9680d11b4da5f9096f9ccefeaa1cd97f46548

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