Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e07e07ca47b7dde…

MALICIOUS

PDF

74.9 KB Created: 2021-02-21 03:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b89d5a50351f55fb81ca9c5f08a5bf8f SHA-1: 0b1ed6df9428cc1380d1d6ac3df27ab606c1c806 SHA-256: 3e07e07ca47b7dde13cc9f9d29b25b3c78061e72e2eb68d7e74297e620f5192b
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'bologen.ru', which is likely part of a lure to trick users into downloading software. The document body, though heavily obfuscated, contains keywords related to software downloads, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/aws?utm_term=java+jdk+8+download+windows+7+64+bit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407314/normal_602535a17b8a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_600cff27b53fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383446/normal_6003dc0fa9f20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407998/normal_600c48e12e580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_5fd7f089b1ffd.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidatoxo/jptjTDG/piffle_meaning_and_sentence.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/jQyiaIJ/stuntman_ps2_iso_europe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476270/normal_6012debd43fed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373999/normal_5ff3f9f31f223.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/7SoNPt1/50399367805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476941/normal_600f21ea840de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468551/normal_6000f2a150fca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/all_star_cheer_uniform_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/84991728392.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/78914304282.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/37447333648.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/lewisville_lake_fishing_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/belief_system_crossword_answer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA95 5332 bytes
SHA-256: 4ac4364353c0d86a94fe5fc0bff6b39c3c1c0a7d1fa18fc5868a5492e6c35ca8
font_01_sfnt_off0000ecdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDD 10384 bytes
SHA-256: a92ef25a8163488b9a41e460477544bf78a3a5ac846485549d4c60554852910d
font_02_sfnt_off0001107e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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