Malicious PDF — malware analysis report

Static analysis result for SHA-256 3673adab1b95e2a8…

MALICIOUS

PDF

81.6 KB Created: 2021-03-27 17:27:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 42b8b3ef6824909e3294f70406c15e09 SHA-1: b18e2468b45ff79f253292677f63e8f2685838a2 SHA-256: 3673adab1b95e2a849ad032e391bcc14ba3dc704895bbea8910151b4d779d261
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'https://dugedepap.ru/strik?utm_term=5+competencias+para+la+vida+pdf'. The document's structure and embedded links suggest it is designed to redirect users to potentially harmful content, likely a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=5+competencias+para+la+vida+pdf PDF link annotation
    • https://rozeravepirasaj.weebly.com/uploads/1/3/2/8/132816036/zorizaj_koperas_suxonigoza.pdfIn PDF document text
    • https://wediwubogeken.weebly.com/uploads/1/3/2/6/132681674/0178648be.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CvgiczF/ragaduwojak.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/KieCige/3437302520.pdfIn PDF document text
    • https://cdn.sqhk.co/kozutani/bgcghic/nikezev.pdfIn PDF document text
    • https://cdn.sqhk.co/dadakafopina/MhfymaQ/retro_fridge_freezer_white.pdfIn PDF document text
    • https://fapixuguxoga.weebly.com/uploads/1/3/1/0/131070829/vawefivada-tomitewal.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/RhjjaPq/royal_family_of_england_latest_news_hello.pdfIn PDF document text
    • https://cdn.sqhk.co/nigudovowa/7iejaic/wobedofexubiluvabeladiger.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/health_and_safety_course_online.pdfIn PDF document text
    • https://73ea35ec-f0b0-4773-8bcb-d62b778c7de8.filesusr.com/ugd/a8e976_34f296dd74dd46ac9a3f538e3fdd557e.pdf?index=trueIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_f13549fae08b4e7aa6d3810a93929ab8.pdf?index=trueIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_b8968da88dd444208d3966f92f81cad7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zabevog/what_mythological_monster_am_i.pdfIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_f20ed2b8342a437fbb991314a72e8b27.pdf?index=trueIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_f3a043244c4a43b0ad4ddf9558303426.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/rowemotogo.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/aashiqui_2_song_ringtone_instrumental.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/booty_farm_mod_apk_4._2.pdfIn PDF document text
    • https://8b8c7005-3af0-45a1-8e5b-a6902caa9335.filesusr.com/ugd/dbd7d9_21d61f4419b547a38888189a3fe36de9.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_off0000ff06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF06 5392 bytes
SHA-256: 0d2894e1797e44bfc71b65bdc754b3a11e9c3949e1bb8ac4f0a763f1eb54e06e
font_01_sfnt_off0001114b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114B 11868 bytes
SHA-256: 2e85a2cab2393e7e8940f97933b489b50907b06110f5909de1a87e529678468e

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