Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce2d15288a5ead5…

MALICIOUS

PDF

78.9 KB Created: 2021-03-15 22:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96fbc34449906d63d789e51bd10b1108 SHA-1: 7355771dcf4809c44ee57786f2c44083522bb951 SHA-256: 0ce2d15288a5ead5ca0d1d1c7285deb06478849e71dd525b38f784e9937a7b16
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness, with the embedded URL pointing to a domain associated with malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/123?utm_term=plague+inc+all+genes+unlocked+apk
    • http://pofevezale.22web.org/how_to_open_a_motorola_e6.pdf
    • https://zafudibibini.weebly.com/uploads/1/3/4/1/134108698/40201217a4da.pdf
    • http://xapikuvixi.iblogger.org/raborawoxaxer.pdf
    • https://mofafodoler.weebly.com/uploads/1/3/0/8/130874416/pemejifivi.pdf
    • https://kogezuzoxato.weebly.com/uploads/1/3/1/0/131070880/jiwofuna-nasitegode.pdf
    • https://bupuzufemu.weebly.com/uploads/1/3/1/4/131452870/vupubafuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tezude/british_council_reading_answer_key.pdf
    • https://s3.amazonaws.com/geraromu/black_and_decker_finger_sanding_sheets.pdf
    • https://s3.amazonaws.com/bubisifapagefe/arithmetic_progression_exercises_with_answers.pdf
    • http://bubexixan.epizy.com/alien_isolation_graphics_mod.pdf
    • https://s3.amazonaws.com/legobegutulo/nulapekeguvizekajasuda.pdf
    • http://lulejusumuru.epizy.com/what_was_the_impact_of_lincolns_proclamation_of_amnesty_and_reconstruction.pdf
    • http://debalipusafuj.epizy.com/duzol.pdf
    • http://tozemuj.rf.gd/gasamer.pdf
    • http://sujimivotabis.rf.gd/research_progress_report_nus.pdf
    • http://zibakogemigana.rf.gd/kanukuti.pdf
    • http://movalezipukud.epizy.com/remington_chainsaw_replacement_chain_16.pdf
    • http://numebazo.rf.gd/abominable_full_movie_in_tamil.pdf
    • http://vodupuginotipir.rf.gd/62326238037.pdf
    • http://gekaxerawuzizuj.epizy.com/51712941632.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec27.bin
295196c7b69947829ca65d95036cd7a284a3082e63f5c211cafcbc0edf1fcbfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC27 5012 bytes
font_01_sfnt_off0000fd3c.bin
7767cbb5011b1f7befccc77752a49a69d31c8c39c69072f2eadf907cafd95b54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3C 10252 bytes
font_02_sfnt_off00012012.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12012 4324 bytes

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