PDF malware analysis — malicious · 8f8b180c373f891a

MALICIOUS

PDF

78.8 KB Created: 2020-12-26 04:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f628ef3091ed7abb3794e04528b4c4c0 SHA-1: 72d821fc8d50f4f448b5119767ea2bfa0e96f153 SHA-256: 8f8b180c373f891ab33c6c68fa9206eb56fc509fb370ab289c634389d0640584

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One prominent URL, 'https://trafffe.ru/strik?utm_term=top+up+card+near+me', suggests a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=top+up+card+near+me
- https://zajilonuxiwez.weebly.com/uploads/1/3/4/8/134871265/kumobipepuguk-wumul-gagorelepifiwex.pdf
- https://static.s123-cdn-static.com/uploads/4464735/normal_5fc6ae7af179f.pdf
- https://cdn-cms.f-static.net/uploads/4388815/normal_5fb37518a54b2.pdf
- https://cdn-cms.f-static.net/uploads/4366654/normal_5faf7ed05a74e.pdf
- https://notuvovezed.weebly.com/uploads/1/3/1/3/131382721/zijokozofimano-jopodama.pdf
- https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/424847.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/henghuili-files2/fejonefubofiwunitidenano.pdf
- https://s3.amazonaws.com/memul/87204999282.pdf
- https://uploads.strikinglycdn.com/files/1c940fe0-df42-40e8-9809-c01aa6b9d756/45746135924.pdf
- https://uploads.strikinglycdn.com/files/c2ed4c24-a961-4fb9-a236-4817d2736d90/mn_driver_vehicle_services.pdf
- https://s3.amazonaws.com/senodiw/driver_asus_x453m_win_10.pdf
- https://s3.amazonaws.com/wunojipu/98047330644.pdf
- https://s3.amazonaws.com/vufupu/adeste_fideles_testo_italiano.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_off0000f99e.bin` `94a98ae0031daaa3b2ec6de7191f9aad3b60305bcd62fb4a3a61815c62690930`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF99E	4960 bytes
`font_01_sfnt_off00010a69.bin` `749de58ed6b81d6932412c91cb01f0e3c44e9364b01b97c4bf9ed48e640d6cc5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A69	10516 bytes

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