PDF malware analysis — malicious · e8c86c706a4dc679

MALICIOUS

PDF

99.4 KB Created: 2020-12-06 20:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 968719ef2df67bf1cd3431674cfd0e4a SHA-1: 659ebbbdc14b6cb2e04e3be030af3090a1207802 SHA-256: e8c86c706a4dc679f6789d4b46d3c15e8a4f8ad1d5c25044d442aa175fe30415

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document that contains a link farm, with one prominent URL leading to a site that appears to be involved in keyword-based traffic redirection. ClamAV and ML classifiers flagged this as malicious, specifically a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to legal agreements, aligning with phishing tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9704

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://traffset.ru/wb?keyword=residential%20lease%20agreement%20template%20zimbabwe
- https://cdn-cms.f-static.net/uploads/4390068/normal_5fb417030ffb5.pdf
- https://wizaxonaguwaxi.weebly.com/uploads/1/3/4/3/134306690/rirodubefo.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://uploads.strikinglycdn.com/files/d6d1c668-3c27-4501-843f-9abda677a81a/98732486074.pdf
- https://uploads.strikinglycdn.com/files/62014072-31df-4d19-a26b-727c56e82462/28616869863.pdf
- https://uploads.strikinglycdn.com/files/027090dd-5b01-4094-beff-9073f28ca973/31800018945.pdf
- https://uploads.strikinglycdn.com/files/f850dfb0-4e14-4684-b69f-a62eb612819b/maslow_s_hierarchy_of_needs_nursing_quiz.pdf
- https://uploads.strikinglycdn.com/files/3deb137f-2ab4-47b7-9eef-0f91f35979a8/rider_game_unblocked.pdf
- https://uploads.strikinglycdn.com/files/73cff6cd-a259-4645-b978-a331197e5ce1/lojomobuzobizumo.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00013a81.bin` `780a71c626d6609db831adf3401583d2d9be06764555575c45629d1b1ec247c3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A81	5248 bytes
`font_01_sfnt_off00014c4d.bin` `7506c1eb01bcd6b55a8f6eb0fba17eb0487c1df59569bdd5eb660fe7d829616a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14C4D	11200 bytes
`font_02_sfnt_off000172a9.bin` `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x172A9	4324 bytes

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