PDF malware analysis — malicious · 81700f5961acc63c

MALICIOUS

PDF

74.7 KB Created: 2020-11-14 21:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c151cf515b037ecca7958dfbc4dea870 SHA-1: 1177528a321e0f0a44ac74d50581370cad50f11f SHA-256: 81700f5961acc63c650846ada441990109a976f8e9af3e38d2ea00735d56958a

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and also by an ML classifier. It contains an embedded URL pointing to 'traffine.ru', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect the user to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 4

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://traffine.ru/123?utm_term=moral+aptitude+in+a+sentence
- https://cdn-cms.f-static.net/uploads/4384143/normal_5fa5c3a43109a.pdf
- https://cdn-cms.f-static.net/uploads/4372073/normal_5f8d93c8c4464.pdf
- https://cdn-cms.f-static.net/uploads/4421360/normal_5faae17e759e1.pdf
- https://cdn-cms.f-static.net/uploads/4452389/normal_5fa2bde8b19ae.pdf
- https://cdn-cms.f-static.net/uploads/4410714/normal_5fa637a8eab17.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://s3.amazonaws.com/zirojopemup/nafew.pdf
- https://uploads.strikinglycdn.com/files/710b4aa3-cc4d-43b5-a05d-9ca3c31fecc5/zetalazizafi.pdf
- https://uploads.strikinglycdn.com/files/243446bc-90e4-4268-a992-7771beb0d01b/bandera_de_panama_vector.pdf
- https://s3.amazonaws.com/lakadutof/elixir_storage_level_12.pdf
- https://s3.amazonaws.com/tuxexi/books_like_girl_code.pdf
- https://uploads.strikinglycdn.com/files/bcd0f3a7-73ad-47f4-a843-0178c78ccf84/39611333715.pdf
- https://uploads.strikinglycdn.com/files/51c2d8f9-d560-4f01-bb5e-14bdfed91107/felixujudawuwijolo.pdf
- https://s3.amazonaws.com/subud/complete_pet_cambridge_download.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000da27.bin` `b4e066544cb32363d20b5d96832592e7f3ef9920975a977d6ab6858499f17932`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA27	4956 bytes
`font_01_sfnt_off0000eb0a.bin` `99922c9b5123dcf8f02cb2d2dab832336286458784303b4d779c9243599794c5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB0A	10768 bytes
`font_02_sfnt_off00010fb2.bin` `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FB2	4324 bytes

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