PDF malware analysis — malicious · faaa554b2a06b581

MALICIOUS

PDF

69.8 KB Created: 2021-02-24 19:00:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 733340f16186651a9c87af44978ca088 SHA-1: 2fa1312ff2ab16f86c69d6e9856c5bbd29544861 SHA-256: faaa554b2a06b58155e868a06cd73b686115c1773fce06c6c017b756094499d8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs with SEO-like titles, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to drive traffic to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=medical+scribe+training+manual+pdf
- https://jotesufuxave.weebly.com/uploads/1/3/1/4/131483421/depuxused_buwemimisoposa_fukajut_sumemaxokidire.pdf
- https://davugewozo.weebly.com/uploads/1/3/1/4/131408984/fikugipuladaxi.pdf
- https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/riwegulevupikuduv.pdf
- https://zasawebisev.weebly.com/uploads/1/3/4/8/134865024/2389b7f95.pdf
- https://gajatizu.weebly.com/uploads/1/3/5/3/135315297/milibazizisera-pomasuligixom-japibev-loradosexiv.pdf
- https://cdn.sqhk.co/pixazizaze/jhieqgf/another_name_for_janitor_engineer.pdf
- https://cdn-cms.f-static.net/uploads/4453108/normal_5fe7d722e42b7.pdf
- https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/bedizivedapes.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/tuxexi/sqlite3_commands_cheat_sheet.pdf
- https://s3.amazonaws.com/bufipevuril/wedding_event_planner_website_template.pdf
- https://s3.amazonaws.com/xajowu/57571381621.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_off0000d66b.bin` `45b625bcb5f583ca30c3500b7dee91de991d8deb73477a6201a6a5841bd541e8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD66B	5620 bytes
`font_01_sfnt_off0000e975.bin` `b50151bc5f504868b1ac7076aaaebce9547ea0f315f6ffdeaae506c895e24cd9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE975	9776 bytes

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