PDF malware analysis — malicious · 15e40d33a1810ca8

MALICIOUS

PDF

65.3 KB Created: 2020-11-14 06:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b24e06a56c06d48c1ba066540b4ecc19 SHA-1: ed48225fbfc3741810ad34fb4d5cbb8f43effe89 SHA-256: 15e40d33a1810ca84bf807498c5bae4ff6b8913afd7defc825b8bb48562a18a4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or used for SEO spam, potentially to direct users to phishing sites or malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://traffine.ru/aws?utm_term=gmail++app+for+mac
- https://cdn-cms.f-static.net/uploads/4382618/normal_5fada8ed18ba1.pdf
- https://cdn-cms.f-static.net/uploads/4378160/normal_5f8be9d4a71c2.pdf
- https://cdn-cms.f-static.net/uploads/4478946/normal_5faf2878af57c.pdf
- https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/gegamefejeroto.pdf
- https://cdn-cms.f-static.net/uploads/4387562/normal_5f9ce4a61b5cb.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/pesetufavo/expectancy-value_theory_definition.pdf
- https://s3.amazonaws.com/kezemiradigu/foolproof_module_4_answers.pdf
- https://s3.amazonaws.com/napoledunadigo/college_scholarship_award_letter_sample.pdf
- https://s3.amazonaws.com/fujadabez/95047308926.pdf
- https://s3.amazonaws.com/wonoti/vejaxojupimudobaxomefux.pdf
- https://s3.amazonaws.com/kovilowab/damusamezoniwe.pdf
- https://s3.amazonaws.com/woberiz/54702997171.pdf
- https://s3.amazonaws.com/bojafazes/gameboy_advance_emulator_for_pc_apk.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_off0000c434.bin` `1560405d435e6e3167983809257fb2ba7aa74bf5a78a609c87db4d997dede58c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC434	5012 bytes
`font_01_sfnt_off0000d52f.bin` `9a22b32d2ab6eb1996a8c83e21163bcab2b9e7a6174357c53c0c95c2bb8ef8f8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD52F	10452 bytes

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