Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98a4c79de27d7d6…

MALICIOUS

PDF

102.6 KB Created: 2021-02-26 20:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0bf46aa2b6abce665694f2f83ca8df1c SHA-1: b3dd5dcffc8d8cb2bf478cb96eb96c715c333c11 SHA-256: e98a4c79de27d7d6194790d84c11a4027cc00921cc88f087c362880030274b57
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were extracted, the presence of a malicious URL suggests the document is intended to redirect the user to a site that likely hosts a secondary payload or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/strik?utm_term=linear+algebra+done+right+solutions+chegg PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477615/normal_6032dca34adca.pdfIn PDF document text
    • https://cdn.sqhk.co/nexasolonit/chhaAji/dobuzinowizifolilo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495985/normal_600b6248b8a85.pdfIn PDF document text
    • http://hydrofthol.space/mens_health_workout_plans_to_build_musclehahcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470019/normal_60369b4a3b0b6.pdfIn PDF document text
    • http://20970907.net/51998181487yfl4o.pdfIn PDF document text
    • http://ompala.store/xileropobi3yik.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/xakusineba/vedozimedit.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/wegudoxelaliretunuj.pdfIn PDF document text
    • http://mobifov.rf.gd/87905045403.pdfIn PDF document text
    • http://zopopujeji.rf.gd/93011592102.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/51219275579.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/edelweiss_tokio_life_fund_factsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/henry_danger_crime_warp.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/widupew.pdfIn PDF document text
    • http://favuzokusom.rf.gd/how_to_use_turbo_convection_oven.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_off00013cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF7 5280 bytes
SHA-256: 20b53dff2f81e35acbc6db122b89be571507579bbc96bcdba21c843e37ef4f8c
font_01_sfnt_off00014ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EDE 12128 bytes
SHA-256: b5a63a745a43decc46a71547973d472523e1d38f06b22148bd1aa6272e1473c3
font_02_sfnt_off000177bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177BF 16188 bytes
SHA-256: ffcd39c30e47f6692017e79cc15eec4e2911891c41baeb170e1df0c10112e9eb

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