PDF malware analysis — malicious · 5f9791f9d94348ed

MALICIOUS

PDF

68.3 KB Created: 2021-01-02 00:02:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 7cdc798ceb9026bb749a81e04c2468bd SHA-1: 56a231bca8a3198726b018a89dafec51d2a8ae1e SHA-256: 5f9791f9d94348ed2227a1c9ca611edf8578a5332b7ad683b66ba9b209b68e37

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by a machine learning classifier and ClamAV. It contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading further malware or visiting a phishing site. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Janome parts manual'. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=janome+parts+manual
- https://cdn-cms.f-static.net/uploads/4468819/normal_5fa844e77b241.pdf
- https://cdn.sqhk.co/gitopedevid/hchdcjg/12113825182.pdf
- https://cdn.sqhk.co/nunemiziku/qTgjSMy/20683613968.pdf
- https://cdn-cms.f-static.net/uploads/4427103/normal_5fe64bfd9985d.pdf
- https://static.s123-cdn-static.com/uploads/4426261/normal_5fca7f8c25f03.pdf
- https://cdn.sqhk.co/gukawaki/cJtjqha/baby_phone_toy.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://s3.amazonaws.com/mokixetat/33986016106.pdf
- https://uploads.strikinglycdn.com/files/207a3f17-d64a-4340-8c2d-0cf11ef24b8f/sonorikisawageto.pdf
- https://s3.amazonaws.com/wajibile/romeo_santos_eres_mia_english_lyrics.pdf
- https://s3.amazonaws.com/jinabisura/minecraft_games_unblocked_online.pdf
- https://s3.amazonaws.com/pugomonapoxuxe/boat_building_manual_by_steward_and_cramer.pdf
- https://s3.amazonaws.com/suxiweke/nhtsa_manual.pdf
- https://s3.amazonaws.com/bifamomove/benzylamine_react_with_nitrous_acid_to_form.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_off0000c3f1.bin` `a646f1f4e41cab3daad2ffb9d6537394fbde2f705596144cfe9a2eb592627987`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC3F1	4788 bytes
`font_01_sfnt_off0000d414.bin` `dbf31028f6c2739e84c8225998714f6acfa91d5014fd909c01c31cb6ca83cded`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD414	10132 bytes
`font_02_sfnt_off0000f6dc.bin` `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6DC	4324 bytes

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