PDF malware analysis — malicious · 08cbecf4bc6adbaf

MALICIOUS

PDF

69.6 KB Created: 2021-02-10 21:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 760f1fc586366b6e0089cc81e2a9f273 SHA-1: 41521ae1dfde6c6c116fb47697dcfde5d941a04e SHA-256: 08cbecf4bc6adbaf753a4947cb48b15f1a48d2f9db3d4a6113c3d02122ba9246

252 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, including 'yafferge.ru', which are identified as malicious. The document body, though heavily obfuscated, suggests a lure related to a 'book cover mockup template'. The presence of numerous external PDF links and redirector links indicates a coordinated effort to drive traffic to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9314

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://yafferge.ru/aws?utm_term=book+cover+mockup+template In PDF document text
- https://datugabow.weebly.com/uploads/1/3/4/7/134745554/tofefes_xovowodawik.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380086/normal_6022fa9162ead.pdfIn PDF document text
- https://mudizuponiwox.weebly.com/uploads/1/3/2/7/132740987/roban_bajafiz_rasava_jajojixuj.pdfIn PDF document text
- https://pukovapu.weebly.com/uploads/1/3/1/3/131379149/546642.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488804/normal_5fe911ec1a439.pdfIn PDF document text
- https://firizuvamo.weebly.com/uploads/1/3/4/6/134618899/ligilukuriwure-xasujogugelev.pdfIn PDF document text
- https://s3.amazonaws.com/wexukufedepim/cookie_policy_template_uk.pdfIn PDF document text
- https://s3.amazonaws.com/varolexexus/17854893181.pdfIn PDF document text
- https://s3.amazonaws.com/kijelopazekune/dell_brocade_6505_datasheet.pdfIn PDF document text
- https://s3.amazonaws.com/vanatul/rawir.pdfIn PDF document text
- https://s3.amazonaws.com/kabisebax/broken_angel_video_pagalworld.pdfIn PDF document text

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