PDF malware analysis — malicious · c41965d5ed94c7ca

MALICIOUS

PDF

75.6 KB Created: 2020-11-20 13:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 4459ee1bab290dd5112b6c297bada9e3 SHA-1: 16125c86582133197b36a39fe98d2c9a1d891649 SHA-256: c41965d5ed94c7ca9a0bb54fc33db750807db1cd797ebb4396c8860ee1210089

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, including one pointing to 'trafficel.ru', suggesting it's part of a link farm or phishing campaign. The presence of a 'download button' heuristic further supports the lure-based attack pattern. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 6

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
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://trafficel.ru/strik?utm_term=project+proposal+template+ppt
- https://palifeselaliku.weebly.com/uploads/1/3/4/4/134441248/518b88.pdf
- https://cdn-cms.f-static.net/uploads/4367290/normal_5f9ea82304f38.pdf
- https://cdn-cms.f-static.net/uploads/4489716/normal_5faef4f7b0c4e.pdf
- https://cdn-cms.f-static.net/uploads/4381082/normal_5f9d16d1ce9e8.pdf
- https://cdn-cms.f-static.net/uploads/4374207/normal_5f94cac859186.pdf
- https://cdn-cms.f-static.net/uploads/4365553/normal_5f874fe048952.pdf
- https://cdn-cms.f-static.net/uploads/4375698/normal_5fad36d237cd5.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/wulotugadag/definition_of_anorectal_malformation.pdf
- https://s3.amazonaws.com/wujapu/fejopigibezorowufixoloza.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_off0000ebba.bin` `97246b8ac10157544e4dfc6bc8e2c247bb74477f2ab57b030669ec848ff56d1e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBBA	5156 bytes
`font_01_sfnt_off0000fd31.bin` `ab74e97d8be0bf06e693e0929489ad1a3ceedacdd41b1d50a09409dc64f2c3fd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD31	10844 bytes

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