Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7fe5c0aff6192d…

MALICIOUS

PDF

143.4 KB Created: 2021-04-13 20:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bbda610eda31c9446ec1e4210556eb7 SHA-1: 2826d00b0ff508d19b29183b4157867db7409633 SHA-256: 8b7fe5c0aff6192ddf355999d04dd808a7c8688978494b87ea0868eca086bbe4
136 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. The document contains an external URI pointing to 'https://zajinet.ru/strik?utm_term=what+is+molecular+dna+markers', which is likely part of the lure to trick the user into a fraudulent transaction. No scripts were extracted, but the PDF structure and heuristics suggest it's designed to exploit user trust for financial gain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=what+is+molecular+dna+markers
    • https://static.s123-cdn-static.com/uploads/4481166/normal_5ff64a287d3c0.pdf
    • http://subejewumo.scienceontheweb.net/mappa_monumenti_amsterdam.pdf
    • https://cdn.sqhk.co/fifenije/cjdcgfy/element_td_dota_2_guide_2019.pdf
    • https://cdn.sqhk.co/lirebirab/iafijcr/rawedipefajokuvekelavoja.pdf
    • https://cdn.sqhk.co/bipozipo/gdjhhcF/mo_salah_vs_messi_stats.pdf
    • http://tututot.mygamesonline.org/best_to_word_converter_app_for_pc.pdf
    • https://cdn.sqhk.co/ludozenidi/hRjhr0P/80984428358.pdf
    • https://cdn.sqhk.co/visevunu/7eonBq2/6601273007.pdf
    • https://static.s123-cdn-static.com/uploads/4492892/normal_5fccc4643ce51.pdf
    • http://joxezorov.mywebcommunity.org/vasagawiti.pdf
    • https://static.s123-cdn-static.com/uploads/4366304/normal_5ff9643e8f0bf.pdf
    • https://cdn-cms.f-static.net/uploads/4457839/normal_6014d55cc4d07.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fa7e753c-cfac-4875-94a4-f76511456626/waxelejuxunapo.pdf
    • https://uploads.strikinglycdn.com/files/a97f1770-da7a-4dda-8975-9d8a8addeaf7/jetilebozudebodiwej.pdf
    • http://wojibikifi.myartsonline.com/49906646760.pdf
    • http://jokajejuti.atwebpages.com/online_file_converter_to_word.pdf
    • https://uploads.strikinglycdn.com/files/0b469270-9640-45a1-aefd-4ff86feea4de/husqvarna_125l_carburetor_diagram.pdf
    • https://s3.amazonaws.com/baxegezivumi/boston_market_chicken_pot_pie_price.pdf
    • https://uploads.strikinglycdn.com/files/93cc9623-fc04-4ebd-a7c8-f809096b5487/bd-j5100_blu-ray_player_manual.pdf
    • https://s3.amazonaws.com/wizomoravazub/coleman_powermate_vp201_air_compressor_manual.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e02a.bin
23a9e111d4572c4b8b479f5334d86d3722700fb33fd23291bea63050e98bde8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E02A 5256 bytes
font_01_sfnt_off0001f1e6.bin
622720cf278acef13c156e98ff179343fc3379da72f127202ee5277020ff1b7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F1E6 12020 bytes
font_02_sfnt_off00021aaa.bin
31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21AAA 16204 bytes

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