Malicious PDF — malware analysis report

Static analysis result for SHA-256 0066389ae6e6f2dc…

MALICIOUS

PDF

83.5 KB Created: 2021-03-06 06:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 36a7e5b9faddb3d68792ce7fd2fd8b93 SHA-1: d046c0ad36eedb6d868e72e4089393238ad58d4a SHA-256: 0066389ae6e6f2dc431c7174d22e6bd224ddc869ee3056f0292fdd6292311d69
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

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=how+to+program+comcast+xr2+remote+to+tv PDF link annotation
    • https://wuxagukokixeg.weebly.com/uploads/1/3/5/3/135398542/4944448.pdfIn PDF document text
    • http://parkji5x.xyz/diffusion_and_osmosis_problems_answer_key_investigate_the_cell_diagrams0qmdw.pdfIn PDF document text
    • https://tidijesugeji.weebly.com/uploads/1/3/4/7/134764535/rejilanivev.pdfIn PDF document text
    • http://xobezised.iblogger.org/hootsuite_2019_social_trends_report.pdfIn PDF document text
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/xivuwakafel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446636/normal_6023fb38d82f7.pdfIn PDF document text
    • https://tuledekubixa.weebly.com/uploads/1/3/4/7/134722649/gurekotef-dusisibaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455881/normal_603a90617b879.pdfIn PDF document text
    • http://urologo.store/vijisojaweruz77vm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380675/normal_5fe518ac8c5b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413019/normal_5fe42ba92e233.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6647c52-f0d7-4bb0-a85b-5c5da538ee7e/6818964951.pdfIn PDF document text
    • http://lunobejol.rf.gd/49731678942.pdfIn PDF document text
    • http://xuxejoser.rf.gd/video_editing_free_app.pdfIn PDF document text
    • http://kofujuluzode.epizy.com/castle_hill_hospital_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4690aaaa-fdf0-4c67-a559-022eec2ebd33/bosch_glm_30_professional_review.pdfIn PDF document text
    • http://wowemipawugese.epizy.com/dell_u2715h_driver_windows_7.pdfIn PDF document text
    • http://lojizigakuxit.epizy.com/96764054392.pdfIn PDF document text
    • http://bututifeb.epizy.com/71860955049.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DF 5532 bytes
SHA-256: 6c7194fa793c553727452f484b1a0d7a4ece27e722f7954b837f499fe421fdd1
font_01_sfnt_off000105bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BB 11052 bytes
SHA-256: 509dbc533c2c7f66785e1802a2e8610b3428bdef05f52d74a017acc2b9546f35
font_02_sfnt_off00012b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B94 16068 bytes
SHA-256: 5338b60dac2ddcc9fbf81734882903060897ff8c18563aad6864a581beec55c6

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