PDF malware analysis — malicious · 85a3532ddbac58fa

MALICIOUS

PDF

67.7 KB Created: 2021-02-18 02:48:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 4d897799b0efe88018e36b3c2790aabd SHA-1: b0fe723c3dfd2509a35b7ad35426a0c8b737528b SHA-256: 85a3532ddbac58fa53b599d56ebb4c6cf750a74c499f1a2d23a5090041e0d153

96 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, with a high risk score. It contains an embedded URL pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The PDF structure and embedded content suggest it is designed to trick users into visiting this external resource.

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://bologen.ru/wix?keyword=d%2526k+travel+guide+books PDF link annotation
- https://cdn-cms.f-static.net/uploads/4418391/normal_6011ebfae2da0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376099/normal_60219c0576b07.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4385412/normal_5fce76d313718.pdfIn PDF document text
- https://cdn.sqhk.co/gisepavuv/hfgcIic/vebebudumetavivesiti.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379720/normal_6018bd97c2a8b.pdfIn PDF document text
- https://cdn.sqhk.co/wunasesev/gdja0on/ringtone_download_website_name.pdfIn PDF document text
- https://cdn.sqhk.co/muvotugi/geRhhIR/17526564681.pdfIn PDF document text
- https://cdn.sqhk.co/givinonu/FggAZJm/labyrinthine_fistula_vs_perilymph_fistula.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://josusasufuni.epizy.com/79283974789.pdfIn PDF document text
- https://s3.amazonaws.com/nefomojuwet/30998625803.pdfIn PDF document text
- https://s3.amazonaws.com/pujirageg/gavububipixatubusafogugut.pdfIn PDF document text
- https://s3.amazonaws.com/mesotodimus/bedamunijesanek.pdfIn PDF document text
- https://s3.amazonaws.com/laginekux/how_to_deal_with_self_defeating_behavior.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cf81.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF81	4156 bytes
SHA-256: `4137e011fb50e940388b7a91a31e36f70741d8ce55ef6fbc7fb0314564e06879`
`font_01_sfnt_off0000ddb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDB1	10892 bytes
SHA-256: `5960f76bf465b92e51c432a4f088c764609fb7057b11d7555025cd15ac9eed4d`

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