Malicious PDF — malware analysis report

Static analysis result for SHA-256 29aef8b108b1ee7d…

MALICIOUS

PDF

79.9 KB Created: 2021-05-08 12:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e345dffbb223e3b21eefe299cba939f0 SHA-1: b73d7edb30dd5eedfc2061bfba142deda67e25c6 SHA-256: 29aef8b108b1ee7d57c45a329553eac2943defe11b8c19322b3da2c0ac6654a1
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and contains numerous external URIs pointing to suspicious domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. Although no scripts were extracted, the embedded URLs are the primary indicators of malicious activity, likely serving as lures or download locations for further payloads.

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://dugedepap.ru/strik?utm_term=minuet+in+g+piano+sheet+music+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368222/normal_5ff41f39d75d0.pdfIn PDF document text
    • http://profyhouse.ru/19181583369nqd2m.pdfIn PDF document text
    • http://smirno.life/nhl_17_trophy_guidexk8gt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455387/normal_6059900ac24e0.pdfIn PDF document text
    • http://wegansit.space/sukugejimafrqfum.pdfIn PDF document text
    • http://saburogamo.iblogger.org/general_data_protection_regulation_gdpr_serve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486550/normal_5fee18feb3dd9.pdfIn PDF document text
    • http://all-system7.club/mixedazenevuzimumuvap3kzg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_60464404bc0fb.pdfIn PDF document text
    • https://kavisovilige.weebly.com/uploads/1/3/5/3/135308643/2532156.pdfIn PDF document text
    • http://shoes-storie.club/hyperprolactinemia_management_guidelines8l6hb.pdfIn PDF document text
    • http://fipoziwebetaz.22web.org/filter_by_cell_color_in_google_sheets.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/mebibikepudonuxav.pdfIn PDF document text
    • http://katorewudejizut.22web.org/97275507211.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_cf31948feaf7436f8e540374fc84a68e.pdf?index=trueIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_457c81f9a6304992ac0c34734493b058.pdf?index=trueIn PDF document text
    • http://sipaduterofa.rf.gd/bula_aradois_h.pdfIn PDF document text
    • http://pazizota.rf.gd/78672538937.pdfIn PDF document text
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_5a9589e7a44e4766abfb78628ab37f72.pdf?index=trueIn 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_off0000ed99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED99 3304 bytes
SHA-256: 7db4aa9dcfc42b3a6ef9a04f555e0b2fea6a31cf0b1e3bf67d3f0cf3b72bc559
font_01_sfnt_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 5444 bytes
SHA-256: 0a4c4f5d0e326174cdecc4371947b007fc6b899197707b83a21e66744c36748f
font_02_sfnt_off00010bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF4 11188 bytes
SHA-256: 9b52e544c9d6050f80f368b8980282b9b99a8d9ee64558c1fb4a98f19131e54d

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