PDF malware analysis — malicious · fb6e8935f67201aa

MALICIOUS

PDF

69.2 KB Created: 2020-11-10 18:32:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: dc5fe1a2fe9ebb1de35071c9aed0bbab SHA-1: 1d6b35314ecab9f80150c50655b2d75cf51b588d SHA-256: fb6e8935f67201aac0e1984ad90679db11fdef98e1439eaf0d7274a58c3f0841

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were directly extracted, the presence of numerous external URLs points towards an attempt to redirect the user to potentially malicious sites, possibly for phishing or malware distribution.

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://trafffe.ru/123?keyword=platform+2020+george+magazine+1997
- https://nazivuwe.weebly.com/uploads/1/3/4/4/134452961/babunazos-levubuzu.pdf
- https://cdn-cms.f-static.net/uploads/4446502/normal_5fa8084bb373b.pdf
- https://cdn-cms.f-static.net/uploads/4366666/normal_5fa4a79f36518.pdf
- https://cdn-cms.f-static.net/uploads/4381101/normal_5f9f862ef32cc.pdf
- https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/1740275.pdf
- https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/2254905.pdf
- https://cdn-cms.f-static.net/uploads/4377647/normal_5f914c4810b54.pdf
- https://cdn-cms.f-static.net/uploads/4384164/normal_5f9975b51923f.pdf
- https://sezemizom.weebly.com/uploads/1/3/4/6/134622585/ruposese_kobexot.pdf
- https://cdn-cms.f-static.net/uploads/4420476/normal_5f966309a8263.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/vapelurowar/canon_rebel_xsi_manual.pdf
- https://s3.amazonaws.com/jenagubadopi/temotuf.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_off0000ceb5.bin` `2de503166efeef6eeb56936f9aa534672c966d99408ab66d6195997366630be3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEB5	5524 bytes
`font_01_sfnt_off0000e17d.bin` `81e98faad70d0402a54f9893565f9012d5735399485252098a9784f69f487543`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE17D	11420 bytes

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