PDF malware analysis — malicious · 3a2aba6417fb4af6

MALICIOUS

PDF

69.3 KB Created: 2020-11-18 04:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 325468297433ce45e08092933b56aa7b SHA-1: 1fc0c09c2d00a5a2397a454465f4bc3fad4e1a5b SHA-256: 3a2aba6417fb4af62e007cac416fb7351604b6e3122f439879875eaed1dc55ed

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which are likely part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to lead users to external malicious content.

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://trafftec.ru/strik?utm_term=barabasi+network+science+book+pdf
- https://cdn-cms.f-static.net/uploads/4379035/normal_5fa4f1048bed2.pdf
- https://cdn-cms.f-static.net/uploads/4393188/normal_5f9155ae6f693.pdf
- https://cdn-cms.f-static.net/uploads/4377909/normal_5f8a8504bfc34.pdf
- https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/nesejapepop_wazetorapiloju_dogonik.pdf
- https://cdn-cms.f-static.net/uploads/4379233/normal_5f9c8dcfcea84.pdf
- https://cdn-cms.f-static.net/uploads/4414848/normal_5fad783b5039f.pdf
- https://cdn-cms.f-static.net/uploads/4365657/normal_5f875c3955277.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/jedadokuti/defidupelitojazadibadagen.pdf
- https://s3.amazonaws.com/pujirageg/67312527898.pdf
- https://s3.amazonaws.com/donake/holley_2_barrel_efi.pdf
- https://s3.amazonaws.com/saziwijaxodav/41949581286.pdf
- https://s3.amazonaws.com/dazovosugev/english_august_upamanyu_chatterjee_free.pdf
- https://s3.amazonaws.com/xukonakefules/81708384060.pdf
- https://s3.amazonaws.com/fosagobomap/chi_cast_member_2020.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_off0000d116.bin` `2c6ec5e8f356e00a7f2259f633de9819da8d73cff531ed706fd32c668d197a58`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD116	5464 bytes
`font_01_sfnt_off0000e3cb.bin` `c4967a812583588630f26de1d9b4a01cad6cd78f3880a17d181ae6383562f784`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3CB	10928 bytes

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