PDF malware analysis — malicious · edb613c8a0dcd659

MALICIOUS

PDF

65.8 KB Created: 2020-11-23 06:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5fd905abfe89abdec65435d0f6d6816c SHA-1: 76cc3d32189749cf6a037e2e8053158e5ed79c7d SHA-256: edb613c8a0dcd6597115b15fe809382eb54e935b4d45121d59393aecc01bc649

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure for downloading software. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

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://trafficel.ru/aws?utm_term=portable+tor+browser+free
- https://cdn-cms.f-static.net/uploads/4401983/normal_5fa409093819f.pdf
- https://cdn-cms.f-static.net/uploads/4392451/normal_5f9d5e690ab6e.pdf
- https://cdn-cms.f-static.net/uploads/4404287/normal_5f9297a7eb618.pdf
- https://cdn-cms.f-static.net/uploads/4472213/normal_5fb3faba4714b.pdf
- https://cdn-cms.f-static.net/uploads/4374715/normal_5f8f7a1aa2d52.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/fasanag/application_software.pdf
- https://uploads.strikinglycdn.com/files/a1fa1800-81fa-4d2a-816e-2fb3fe1e8cf1/boat_co_ownership_agreement_template_free.pdf
- https://uploads.strikinglycdn.com/files/1b88e2b9-17db-4355-8f07-f51d141244ea/92692997428.pdf
- https://s3.amazonaws.com/nitatotol/notification_reader_android_github.pdf
- https://s3.amazonaws.com/mejados/47618821302.pdf
- https://s3.amazonaws.com/nerugiraxura/visual_figure_ground_worksheets.pdf
- https://s3.amazonaws.com/dazuxujepov/aixam_crossline_workshop_manual.pdf
- https://uploads.strikinglycdn.com/files/9e79a7ed-3276-4a05-a951-52953ea05a67/kane_brown_found_you_chords.pdf
- https://s3.amazonaws.com/kulinisokakewi/tipos_de_plantas_carnivoras.pdf
- https://uploads.strikinglycdn.com/files/6b291a3b-3782-4634-8ad9-ec2ae9421955/crock_pot_pressure_cooker_sccppc600-v1_manual.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_off0000c573.bin` `0b7358d7c59f3806690c13d11369ac279e4ccfab8a83f47bf878d89182369adc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC573	4992 bytes
`font_01_sfnt_off0000d68a.bin` `369db2a0086688f13abe88331bc29ae94fe4e3ecf13730c7fcdc322af96cb51e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD68A	10636 bytes

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