Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbabc056490a7e9b…

MALICIOUS

PDF

62.1 KB Created: 2021-01-29 18:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a255ee116e59e26b4361f4676c9a78c7 SHA-1: eac398ed2c6e3017972e2a5db218246d99cc5913 SHA-256: bbabc056490a7e9bfce3f3a3fd1c50ce3041b74d7def570f54ee7b0421fac9ee
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics identified numerous external URIs, including one that appears to be a link farm designed to redirect users, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to trick users into visiting malicious sites.

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
  • 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://bologen.ru/123?utm_term=vimeo+drake+and+josh+movie+job+online PDF link annotation
    • https://cdn.sqhk.co/rufosopufu/gj0e41m/dsi_2019_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/wafifovuwel/ajaCihP/kiliti.pdfIn PDF document text
    • https://menekagamop.weebly.com/uploads/1/3/4/0/134097565/7049289.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/n0bhehj/infection_board_game_rules_with_dice.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473651/normal_5fe54a57d54a5.pdfIn PDF document text
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/buwijutozijow-sikewi-bulug-fejap.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/QhgxyiV/7423248069.pdfIn PDF document text
    • https://bobiputab.weebly.com/uploads/1/3/2/8/132814039/banugib-rogewas-folelix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_5fe812fe805ca.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/ihhehaq/33584416472.pdfIn PDF document text
    • https://pidilamobojuri.weebly.com/uploads/1/3/5/3/135310388/vixorati.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/dgjogc9/chess_online_olympiad_twitter.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/masiwiwuvajim.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/wetevali/the_chase_barnstorm_games_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/69738148151.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/first_world_war_causes.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/3183606648.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/high_priest_judex_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60D 5368 bytes
SHA-256: 68575f80a3e5aa849cc03a01af8e50227ce1bd68b232c01bd649f705553d94e2
font_01_sfnt_off0000c82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82F 10372 bytes
SHA-256: 60de343bbe9f2c152b8c410e5fc50f86b0f3bd530bb1217e3c9f534a4dc2b122

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