PDF malware analysis — malicious · d2424b8f92b4cd1a

MALICIOUS

PDF

70.9 KB Created: 2020-11-22 16:12:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0d81d84d58093b2427a0dc211fd019c0 SHA-1: 1b9f3be36c44cb8561880794adb849ad5988829f SHA-256: d2424b8f92b4cd1a3c80cc81ab3e55dc69c486412f11937e5fb7c01b413635af

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 potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution scheme.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://trafffi.ru/123?utm_term=klim+dakar+pants+2019
- https://cdn-cms.f-static.net/uploads/4367013/normal_5f8a9c47858a4.pdf
- https://severuzilun.weebly.com/uploads/1/3/4/7/134710190/75ca6f1b4532fef.pdf
- https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/6231583.pdf
- https://kafaziwe.weebly.com/uploads/1/3/1/0/131070109/7e453b.pdf
- https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/6efa20101b782.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/2f6b804a-b263-443d-90f3-ae32deaf5d56/turubenavawewesonegamina.pdf
- https://s3.amazonaws.com/sabobenuwe/fewumotatabo.pdf
- https://uploads.strikinglycdn.com/files/91cc917c-961a-422a-9fcf-537aa272fecf/wuxoneteni.pdf
- https://uploads.strikinglycdn.com/files/4c2133e4-3e76-4ffb-8f36-2e54dc9fb79a/gilal.pdf
- https://s3.amazonaws.com/kukazowox/9342379037.pdf
- https://s3.amazonaws.com/rerinago/52989206929.pdf
- https://uploads.strikinglycdn.com/files/94dc73b2-51fd-4f9c-85ea-7b0ac8bfc52b/zevakojipuxunap.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_off0000d4fd.bin` `e8eebeb5e4a6131b838816b573ad97ac67ba5abb864ff941775ade1781381c91`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4FD	5620 bytes
`font_01_sfnt_off0000e7fe.bin` `9f1c4fd5f8995a032ed2162c7274536ff2e59410c8fad7df0db40278b55abd53`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7FE	12264 bytes

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