PDF malware analysis — malicious · d9df9f365aa40aa1

MALICIOUS

PDF

92.8 KB Created: 2020-11-18 03:37:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b98354da7b3bee14340bf3d48f8ffd0c SHA-1: 13c40c3050d3683186c9fe8fd6782999e2114394 SHA-256: d9df9f365aa40aa1c22f851049e0143a88beee659b506f0f5a11d9c6e39ecbde

156 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, exhibiting characteristics of a phishing or link-farming campaign. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with one prominent URL being https://traffnew.ru/aws?utm_term=theeran+songs+free++masstamilan. While no scripts were extracted, the presence of numerous external links suggests an attempt to redirect users to potentially harmful content or phishing pages.

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://traffnew.ru/aws?utm_term=theeran+songs+free++masstamilan
- https://cdn-cms.f-static.net/uploads/4369638/normal_5f9a8f5e59681.pdf
- https://cdn-cms.f-static.net/uploads/4373008/normal_5f97836c44f37.pdf
- https://cdn-cms.f-static.net/uploads/4496826/normal_5fada96f6f088.pdf
- https://cdn-cms.f-static.net/uploads/4412900/normal_5fa884ae145d3.pdf
- https://cdn-cms.f-static.net/uploads/4477878/normal_5fb3df8382ae8.pdf
- https://cdn-cms.f-static.net/uploads/4405651/normal_5fa72202c0581.pdf
- https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/4732236.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/952b5f6c-ac5c-4c77-aec7-e034852a58e2/zebosuzizefowonewit.pdf
- https://uploads.strikinglycdn.com/files/5a5a96b2-f240-4290-94ed-36a9c56f08f7/52421167056.pdf
- https://s3.amazonaws.com/gurowozenupifi/pathoma_2017.pdf
- https://s3.amazonaws.com/gewisetug/zowebulaguzasowenin.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_off0001309a.bin` `cc6dd82341b6d300ecab6c39a9b29b887e23ba5eb03d0d6b05f24ee5e55d4028`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1309A	5132 bytes
`font_01_sfnt_off000141e4.bin` `5dba306a7186acd06c8b3f481669be3dd1e7b0d8851205edbeb680d623885aee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x141E4	10836 bytes

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