PDF malware analysis — malicious · 339bfaf3bfa5d5f4

MALICIOUS

PDF

85.4 KB Created: 2021-04-04 07:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a39dc71067e4a17e2e69a8ef82dd952d SHA-1: 72980a1840c96ac726ae367ddd1a78fe5984b652 SHA-256: 339bfaf3bfa5d5f4c5bb74914a2eca55af43bdbb6c25737525391139a478b50a

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic indicating an external URI, specifically a URL that mimics a search result. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of an embedded URL points towards an attempt to redirect the user to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://dugedepap.ru/award?keyword=arduino+ide+introduction+pdf
- https://static.s123-cdn-static.com/uploads/4369496/normal_5fc9f19189829.pdf
- https://cdn-cms.f-static.net/uploads/4365659/normal_6023fecd7f882.pdf
- https://cdn-cms.f-static.net/uploads/4379960/normal_6039b1c5142c8.pdf
- https://static.s123-cdn-static.com/uploads/4486201/normal_5fedf9bcc1f4e.pdf
- https://cdn-cms.f-static.net/uploads/4376602/normal_601f5a0290bed.pdf
- https://cdn-cms.f-static.net/uploads/4409254/normal_6048fc52b58e4.pdf
- https://static.s123-cdn-static.com/uploads/4407084/normal_5fc735f8c49cc.pdf
- https://cdn-cms.f-static.net/uploads/4476272/normal_605db417bf278.pdf
- https://cdn-cms.f-static.net/uploads/4500893/normal_601a2b44a5fc0.pdf
- https://static.s123-cdn-static.com/uploads/4369525/normal_5fcea84ed9654.pdf
- https://cdn-cms.f-static.net/uploads/4388041/normal_60137f1f1906c.pdf
- https://cdn-cms.f-static.net/uploads/4464865/normal_605f617f72fd8.pdf
- https://cdn.sqhk.co/tamikoveken/gfuicju/ez_loader_single_axle_trailer_specs.pdf
- https://cdn.sqhk.co/wolebiduju/Bhhjgjj/games_like_cats_crash_arena_turbo_stars.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/sesijesule/amman_movie_tamil.pdf
- https://s3.amazonaws.com/gapivegek/xikomowev.pdf
- https://s3.amazonaws.com/tobobowu/najeviriko.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00011191.bin` `bad8f7d39ae294268638218ea6910734f66e92e83fbd323057c7d6d2fed75df5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11191	4716 bytes
`font_01_sfnt_off000121b3.bin` `51037c01de75337fa55a4295b9e39b812b56f433dc8bb9a47a2188795a5689aa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121B3	11548 bytes

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