PDF malware analysis — malicious · ed40f79bcdd765a5

MALICIOUS

PDF

65.4 KB Created: 2020-11-25 06:39:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07

MD5: cf85cca670986cb547bf8fe23e83e670 SHA-1: 3c096248456746df5da6369dab1a93968020aecf SHA-256: ed40f79bcdd765a51aa5ae8598bd02bc704b14b9bf7dccf4eee956ae8c8e1d4b

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'trafftec.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to a 'US immigration test study guide'. No scripts were extracted, but the presence of an external URI and the overall malicious verdict strongly indicate a phishing or downloader attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

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://trafftec.ru/aws?utm_term=us+immigration+test+study+guide PDF link annotation
- https://cdn-cms.f-static.net/uploads/4464709/normal_5fb60040497fb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413838/normal_5fa5ebc93bef7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372382/normal_5f8b9be8932a8.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/vuterijoze/dungeon_keeper_1_guide.pdfIn PDF document text
- https://s3.amazonaws.com/lazolu/sudedimikagoriradesaxusog.pdfIn PDF document text
- https://s3.amazonaws.com/domegagowevag/13093997129.pdfIn PDF document text
- https://s3.amazonaws.com/baxekojojexusol/irrational_exuberance_3rd_edition_free.pdfIn PDF document text
- https://s3.amazonaws.com/jipowumat/class_10_chemistry_chapter_5_notes.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files2/76751706594.pdfIn PDF document text
- https://s3.amazonaws.com/sazixipame/7_wonders_of_the_world_in_tamil.pdfIn PDF document text
- https://s3.amazonaws.com/fukezavazuj/65521652625.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c345.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC345	5204 bytes
SHA-256: `3c15a32d3075d972887a4c711ca0b474f9fc96e56e220361bd27407cb9ba7dc5`
`font_01_sfnt_off0000d4ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD4EA	10220 bytes
SHA-256: `88c9e27cdfce3d7d07afbca0fe01ecbac650727811b8ba8a210c336c99b5b957`

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