Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc85fee1b693862f…

MALICIOUS

PDF

84.6 KB Created: 2021-03-13 15:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 303642fae53d86d89e74f41e8c5a210c SHA-1: d46c1a81e821094d7091168e36579fd1e4465490 SHA-256: fc85fee1b693862f9128f80453518c68480258b3d393d490a81f4f98830f9532
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware delivery attempt. The document body, though heavily obfuscated, contains text related to leadership, suggesting a lure to a malicious website hosted at 'botokaw.ru'. The presence of multiple external URIs and a link farm heuristic further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/strik?utm_term=que+significa+ser+un+lider+proactivo PDF link annotation
    • http://drovazvenigorod.ru/18779263895oem1o.pdfIn PDF document text
    • https://cdn.sqhk.co/purorenutuw/gfEjgid/dungeon_keeper_ami_tropes.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/Chdt3ih/sokipinaxetegisediwuxit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_600c02c679ead.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490125/normal_5fc86c4278f01.pdfIn PDF document text
    • https://cdn.sqhk.co/nagigureti/igfihmI/15532368023.pdfIn PDF document text
    • http://matras-24.ru/foundations_digital_debt_quiz_answers98us3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413987/normal_5ff8098b4e487.pdfIn PDF document text
    • http://malowatava.iblogger.org/what_does_stand_fast_mean.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489244/normal_601e4f988d684.pdfIn PDF document text
    • http://chelobaka.space/its_kind_of_a_funny_story_trailerj4yhl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_6026607210ce2.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/jd8gihb/terra_mystica_fire_and_ice_end_game_scoring.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406776/normal_5fc5f6ac88640.pdfIn PDF document text
    • https://cdn.sqhk.co/garoresolif/hqhjl3E/41961791037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444875/normal_6035a8c2d1b61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529024/normal_6006d753cb039.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0d0d77b-4c00-4265-bc22-f0cc5cf11ada.filesusr.com/ugd/957eb4_f5778dccc8964cb793c1c82688fddd1f.pdf?index=trueIn PDF document text
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_c3d7142800494aaa87422c1869466fc5.pdf?index=trueIn PDF document text
    • http://gisipusizen.rf.gd/64772632896.pdfIn PDF document text
    • https://7f2467c6-0d80-4e38-8df7-27624e0b9669.filesusr.com/ugd/e19533_a234098a778d4ef883fb34136434bb5e.pdf?index=trueIn PDF document text
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_91478dcf8ff847f089efb7e4af7e81fc.pdf?index=trueIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_c10be3e759424c179349c0aa48bd500a.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4E 5444 bytes
SHA-256: 773f4c38fc53974901a014491878fa7fef05c87a6999d60b7f046dfc2b2c6035
font_01_sfnt_off00011def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEF 11424 bytes
SHA-256: e2486c308c7189593adee1d1b8558bc992c5851afa20371965de9b4f188f936e