Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b8da90839f972b…

MALICIOUS

PDF

85.8 KB Created: 2021-05-23 13:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aabf04a7a51519cb1b1a1af9f3c1470b SHA-1: 71a66948b8072d83209280864c825ce3bf710ea3 SHA-256: 07b8da90839f972bec055247408d5a4457101518d1dc4fcd514521af8f3f204d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=total+gym+workout+chart+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393502/normal_60463ad3e0d4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_603114929eeeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410717/normal_6056a89929378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390095/normal_6040612f6963b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_60596525ee3d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_6066429ea5429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482012/normal_60347ee7b4fda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4531523/normal_5fdff39f251a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408598/normal_6036d8c8973c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482215/normal_60552348b31ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_60607b39506ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494166/normal_5fc9e27f73a09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_606113cf843c6.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/gupawupigawono/56574201474.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/canon_sure_shot_film_camera_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/xeguwologuzogu.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/29179431087.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/yamla_pagla_deewana_full_movie_2011.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/77832624460.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/bipolar_disorder_patient_case_study.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/giant_tissue_paper_flowers_template.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_off0001048e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048E 5208 bytes
SHA-256: c465e3b94a578e84470196a477785bd08e443ec1f26bc3abfb446b22406e70dc
font_01_sfnt_off0001165e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165E 11104 bytes
SHA-256: 6eb90585cc2fea382126e8a3fcf68f04b4e02c3d87810ad8a8d1e91dd23276b1
font_02_sfnt_off00013bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BDE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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