Malicious PDF — malware analysis report

Static analysis result for SHA-256 8363bce0a555713e…

MALICIOUS

PDF

92.9 KB Created: 2021-04-26 16:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d935f6fd78ca15e275adfbf972b984be SHA-1: 1af573a7b0c30574d69f0a03f6344049480f67a5 SHA-256: 8363bce0a555713e0967b0710db30aeba7df52ae017d3c2ae5d71171137c503a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs pointing to suspicious domains, suggesting it's designed to redirect users to malicious sites. The presence of PDF-specific heuristics and the ML classification strongly suggest a phishing or malware delivery attempt via a malicious PDF document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=what+eye+has+not+seen+nor+ear+heard
    • http://gakmancreatures.ru/duck_hunt_gun_how_it_works6v3cr.pdf
    • https://cdn.sqhk.co/dedizajo/7giEqcc/69587681538.pdf
    • https://cdn.sqhk.co/vadetegubufo/XUNZjgP/star_zone_woodland_california.pdf
    • http://khareedforosh.com/can_netherland_dwarf_rabbits_live_inside7ym52.pdf
    • https://cdn.sqhk.co/bafujifi/ighg51J/ravorutedisomofaribax.pdf
    • http://shimano-stradic.ru/2005_dodge_ram_1500_5.7_l_hemi_specs9n438.pdf
    • http://usersdeviceprotectionservice.site/44701453311ub41p.pdf
    • https://cdn-cms.f-static.net/uploads/4416136/normal_6012bfef7ec0b.pdf
    • http://copyrighthelpcentral.com/348342961967tvm4.pdf
    • https://cdn-cms.f-static.net/uploads/4408989/normal_5fdba5ef8fa6a.pdf
    • http://hot-money.fun/909564918324mixn.pdf
    • https://cdn-cms.f-static.net/uploads/4477615/normal_602a6fa1571d5.pdf
    • https://cdn-cms.f-static.net/uploads/4403806/normal_602421061dd57.pdf
    • https://cdn-cms.f-static.net/uploads/4402481/normal_603c213c901b4.pdf
    • https://cdn-cms.f-static.net/uploads/4417815/normal_604c9c2069bb4.pdf
    • https://cdn-cms.f-static.net/uploads/4382974/normal_6022422d6d2c1.pdf
    • https://static.s123-cdn-static.com/uploads/4422877/normal_5fcf428be3bdf.pdf
    • https://cdn.sqhk.co/seponidozit/ij0igpW/kofukibidimu.pdf
    • http://fruitnaturs.space/trauma_abdominal_2020m5qh2.pdf
    • https://cdn-cms.f-static.net/uploads/4454436/normal_60693b5a1afd3.pdf
    • https://cdn.sqhk.co/gaduwifawide/d7Pgdic/belling_format_oven_timer_instructions.pdf
    • https://cdn-cms.f-static.net/uploads/4446259/normal_6052e8fc1ebc4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6b6268e9-f05b-42d0-9acb-61139835e9cc/heat_and_mass_transfer_gate_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/cc24bc7b-5dbd-435e-bb38-050c8f03c749/how_does_excel_help_students.pdf
    • https://uploads.strikinglycdn.com/files/356504f5-f0e2-43b5-93d5-53eac0e10114/technivorm_moccamaster_kbg741_ao_mat_chroom.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e7c.bin
d6d3119e8b7869ceb9f61bb4bf3b21a7af2e59fc64d373ae1719c0f1701f30b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7C 4996 bytes
font_01_sfnt_off00013f86.bin
034ffd5a37b8bc7388689bf906647c011c834451215950587b976df3e6e47749		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F86 10836 bytes

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