PDF malware analysis — malicious · faeb24c3b1f69c29

MALICIOUS

PDF

66.8 KB Created: 2020-11-21 01:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 152e67b9e7991bf43a7a30299ccd3fd1 SHA-1: 1ac4db23249dd1f1fbeb0fbadf62ea36c970cfc1 SHA-256: faeb24c3b1f69c2992a02f9efa38ed7b19ed3b9ed24457661c45b10c1df81e06

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or redirection mechanism. The embedded content, though heavily obfuscated, likely contains JavaScript intended to download and execute a second-stage payload from one of the listed URLs.

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://trafftec.ru/123?utm_term=santa+rosa+city+bus+schedule+route+12
- https://cdn-cms.f-static.net/uploads/4379854/normal_5f9121b115ee0.pdf
- https://fenivubad.weebly.com/uploads/1/3/4/4/134482284/4970263.pdf
- https://demogevofowa.weebly.com/uploads/1/3/4/6/134608938/4203019.pdf
- https://cdn-cms.f-static.net/uploads/4390371/normal_5fa99c82a3bd1.pdf
- https://xiwodaboxidedu.weebly.com/uploads/1/3/4/6/134647922/9078128.pdf
- https://cdn-cms.f-static.net/uploads/4366010/normal_5f875a469c824.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/gewisetug/tepujuvaxesu.pdf
- https://uploads.strikinglycdn.com/files/a363e854-2e5e-458e-8d9e-ba3b58c88ace/59943381051.pdf
- https://uploads.strikinglycdn.com/files/0e58dfcd-debe-4d44-9609-803d549e6cb8/harry_potter_pc_games_free_download.pdf
- https://uploads.strikinglycdn.com/files/f97a8b92-1d38-420a-b494-0859f04e9470/47918471131.pdf
- https://uploads.strikinglycdn.com/files/17362b00-c4b2-46bb-ae9a-3a7770b64f82/wetozaxamenobusuzov.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_off0000c85a.bin` `f220c43a9a33cce48b9e0f558e327a2138c1e0c72e001f18ca5890d0f32a3e40`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC85A	5556 bytes
`font_01_sfnt_off0000db3d.bin` `ffe1de101b8c19ad3cf745b18c13e6beb8f0b2d209c5c8d1fc7d7162e0eb0aa4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB3D	10372 bytes

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