PDF malware analysis — malicious · bdfad6b14dd1808e

MALICIOUS

PDF

69.7 KB Created: 2020-11-11 20:24:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a7b7b6490c81fb5479becc3a4de30231 SHA-1: d6e390e2deb0aacbbae38812d48ccadef6c69b79 SHA-256: bdfad6b14dd1808eb0853b8ab6a001b8307fdfc742dd446114d67fa2ab549bf5

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of a malicious URL and the overall detection profile suggest this PDF is designed to lead the user to harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 4

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.
ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://cctraff.ru/123?utm_term=packer+collegiate+institute+covid
- https://cdn-cms.f-static.net/uploads/4373769/normal_5f92353fb8457.pdf
- https://cdn-cms.f-static.net/uploads/4373527/normal_5f9d818f5c396.pdf
- https://cdn-cms.f-static.net/uploads/4457563/normal_5fa4a197c1965.pdf
- https://cdn-cms.f-static.net/uploads/4445557/normal_5fa6264422ee8.pdf
- https://cdn-cms.f-static.net/uploads/4411483/normal_5fa6ebd91134c.pdf
- https://cdn-cms.f-static.net/uploads/4370542/normal_5f946cb621e43.pdf
- https://cdn-cms.f-static.net/uploads/4388614/normal_5f95b4021f14f.pdf
- https://cdn-cms.f-static.net/uploads/4416319/normal_5f98b268eff2d.pdf
- https://cdn-cms.f-static.net/uploads/4367289/normal_5f9ec3b692dc9.pdf
- https://cdn-cms.f-static.net/uploads/4379973/normal_5f917d8329db1.pdf
- https://cdn-cms.f-static.net/uploads/4366978/normal_5f873969eeb35.pdf
- https://cdn-cms.f-static.net/uploads/4476767/normal_5fa9326b8340d.pdf
- https://cdn-cms.f-static.net/uploads/4415524/normal_5fa84d54e54b9.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/22f77ec6-8be8-41cf-8512-d2d4a4a0d2a9/labebevosiz.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_off0000d305.bin` `3ea34b3521dc5848b5dc9908af98f8168fca485d2637ec7b5cd075b7d7bf456b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD305	5232 bytes
`font_01_sfnt_off0000e4e6.bin` `0e2dade4a48115d7e006ceeb6ca413416db09afea92319662f0a1d49da69efe2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4E6	11012 bytes

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