Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a7b564608def4c…

MALICIOUS

PDF

84.6 KB Created: 2021-04-27 01:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1416a89c89ab5028bd3172148488feb6 SHA-1: b2513cfb55ab9c886900290210ffe3f87680d004 SHA-256: 39a7b564608def4cdfdfcb3d5cace043ba0281c7f3ec802c798e2fae0b2a9034
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'https://jacksth.ru/strik?utm_term=pascal+triangle+python+code', which is likely the phishing lure. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jacksth.ru/strik?utm_term=pascal+triangle+python+code
    • http://lukaruji.iblogger.org/biocontrol_of_plant_pathogens.pdf
    • https://rapovadok.weebly.com/uploads/1/3/4/7/134705404/3023935.pdf
    • https://cdn-cms.f-static.net/uploads/4462694/normal_60156801b6481.pdf
    • https://cdn-cms.f-static.net/uploads/4484143/normal_60329d3ea5df0.pdf
    • http://segorewadidet.iblogger.org/agrippina_vaganova.pdf
    • https://xulozajewe.weebly.com/uploads/1/3/1/3/131384688/ruzidesaxarufiv.pdf
    • https://gibotexoruz.weebly.com/uploads/1/3/4/6/134634126/nemelilagax-fudixo-dosuzo.pdf
    • http://jupumatoza.iblogger.org/arras_del_espiritu_versiculo.pdf
    • https://cdn-cms.f-static.net/uploads/4467573/normal_602ee799cf372.pdf
    • https://fubareno.weebly.com/uploads/1/3/1/4/131482864/vopunaf_xovemewi_fixos.pdf
    • https://pikezusepi.weebly.com/uploads/1/3/2/7/132740337/7002925.pdf
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/93688.pdf
    • https://cdn-cms.f-static.net/uploads/4473642/normal_606cdf537657d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lamisegowa.epizy.com/astral_body_powell.pdf
    • http://nizifewinuli.epizy.com/12778623409.pdf
    • http://sefenepisepaje.rf.gd/38471024220.pdf
    • http://jutefuzu.rf.gd/ca_lung_contouring_guidelines.pdf
    • http://tuvuwibeguz.epizy.com/98153445332.pdf
    • http://jefiwimagi.epizy.com/collie_slater_literature_in_the_language_classroom.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_off0000ff16.bin
d2f2843d5079034dc362f32b9a20f95666a44146e0a4e59e0dabc1a4ba6d8224
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF16 5228 bytes
font_01_sfnt_off000110c9.bin
b2ae3f1cc126f8f5e5eba9d2dbaf8bff137b5b37e071d4ce0112b2019ae3c4d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x110C9 11272 bytes
font_02_sfnt_off0001376d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x1376D 4324 bytes