Malicious PDF — malware analysis report

Static analysis result for SHA-256 82155994fa63316a…

MALICIOUS

PDF

72.0 KB Created: 2021-02-22 23:56:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 42d76fc645865c489f2aa76616330524 SHA-1: 2a639d805af0efee8f7857ffb204cd52b2c2a41d SHA-256: 82155994fa63316a7cc9a87b60995a80e1f93ebf6c573e2a099e70db62656547
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=bose+companion+20+multimedia+speaker+system+power+adapter PDF link annotation
    • http://m-laskin.ru/riddles_with_answers_hard_adultskmp2u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452199/normal_5fec682ee24cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403689/normal_6007e9f8af545.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368468/normal_6003017dde9d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479905/normal_5fd9e9e14a5e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422640/normal_5fd23a47cad29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479933/normal_5febd3d67ba9f.pdfIn PDF document text
    • http://autobuff.xyz/toefl_vocab_bookq3ten.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fizaxo/spring_webflux_performance.pdfIn PDF document text
    • http://vobewegogiz.rf.gd/adjectif_interrogatif_exercices.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/star_wars_clarinet_sheet_music.pdfIn PDF document text
    • http://fibejebovef.epizy.com/46524737963.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/taare_aatish_song_lyrics.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1A 5684 bytes
SHA-256: 4dba2ddda97097ae46f85e23a78a94ac4fe50161b5de007ab998444e41a22544
font_01_sfnt_off0000dd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6C 11588 bytes
SHA-256: 4e4a619a6905b747903805ed7de1150b91f2f243e7fa9f3ee7b019172c3e3248
font_02_sfnt_off00010471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10471 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34