Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be327105307b655…

MALICIOUS

PDF

80.9 KB Created: 2021-04-05 17:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e60cd414cd116e2cb0ed19b59ff9791c SHA-1: db4e17c5b1380304c9f33b5bee96a1079d9b9240 SHA-256: 0be327105307b655dbb29ee27a099e07daf02393bc491f2efb3a2e4924c13413
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with one pointing to 'kuzutuzo.ru', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, indicates a lure related to 'The Godfather Mario Puzo book summary'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/strik?utm_term=the+godfather+mario+puzo+book+summary PDF link annotation
    • https://luroxonigin.weebly.com/uploads/1/3/1/4/131406321/pomuko_ropovon_lagurexuseji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483072/normal_603505aa347da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422180/normal_6024c3d012722.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/idajfhb/free_brain_games_for_seniors_aarp.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/ejejiij/facts_about_animals_in_ww1.pdfIn PDF document text
    • https://nelejejo.weebly.com/uploads/1/3/4/8/134883178/zepegijisopozelatize.pdfIn PDF document text
    • http://kovemiwixipogaf.66ghz.com/bhoot_fm_3_august_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/gjdhe9Z/suxujufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_601ca4c10ef5e.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/hjDWib3/rowdy_wrestling_controls.pdfIn PDF document text
    • http://veduxaze.iblogger.org/13840695731.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/Wjd2hjL/xukaxuwolafojatanifipi.pdfIn PDF document text
    • http://fomirevadago.22web.org/38490999824.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/vikukinumet/hosanna_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/vertical_jump_bible_2.0_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/airbnb_guest_book_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/8377054244.pdfIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_e677f5d403c947468d8b9a1eaf03a58e.pdf?index=trueIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_01cbbb6d036047b286d4b80a2b860879.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/morozevobefowimo.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_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 5728 bytes
SHA-256: 63992834969fab8337c1697cfaa2d9811a9b22160adb1ec579cf8c481586509d
font_01_sfnt_off00010e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E67 11472 bytes
SHA-256: 11654c6bbf6ebcfe45ccf636d12c1d9f969701e65bf429fa5b5b5c323d893ac3

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