Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eec21970c9acc6a…

MALICIOUS

PDF

76.4 KB Created: 2020-12-15 05:22:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d10cb8cf4ec7041800bd83502045b27 SHA-1: ee4f44090e675672b8b813587efb563231608c25 SHA-256: 6eec21970c9acc6ad626cdb7425249183f102a86d55a23755471b7ca40763a39
104 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to a suspicious domain, combined with the document's presentation as a service manual, suggests a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to facilitate malicious actions like downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/123?utm_term=lexmark+e232+service+manual
    • https://diziwupufetut.weebly.com/uploads/1/3/4/4/134477772/4401013.pdf
    • https://cdn-cms.f-static.net/uploads/4498842/normal_5fb81508620f6.pdf
    • https://rosanibo.weebly.com/uploads/1/3/4/8/134873488/xufurimute-wigovibik-wanerawuziwomog-pudexabawobovo.pdf
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/taxadifupesafutom.pdf
    • https://cdn-cms.f-static.net/uploads/4387562/normal_5fb4b192e349b.pdf
    • https://cdn-cms.f-static.net/uploads/4414169/normal_5fbb51718c1a1.pdf
    • https://rovatelafewi.weebly.com/uploads/1/3/4/3/134392743/petenulefadito_jegina.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/buponuwebi/windows_10_driver_for_hp_officejet_pro_6968.pdf
    • https://s3.amazonaws.com/gazivemon/biwekigijutag.pdf
    • https://s3.amazonaws.com/wetevali/gidisewezowop.pdf
    • https://s3.amazonaws.com/tizowodifi/37345301970.pdf
    • https://s3.amazonaws.com/mefadedosuw/eng1_medical_certificate_form.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_off0000e3f4.bin
5f7ded07ea3602f0924bdae39dfaa821cedbccaf61dbcda79d77001ff9da3c31
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F4 5372 bytes
font_01_sfnt_off0000f62b.bin
7585ea263064cefce43c9d15a4a908a12fff14130f87a17828f995a274c4ee8c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF62B 2012 bytes
font_02_sfnt_off0000ffc9.bin
e483f7130108c381162d31c40090d425f28ad36246aed799eea728ff0fc4bb76
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC9 10756 bytes