PDF malware analysis — malicious · 1c24a9e9c8d7fdbf

MALICIOUS

PDF

64.8 KB Created: 2020-11-19 23:04:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31

MD5: 11e889f6a520a2f4426a0d16eb82e3af SHA-1: 1a64ae8b0b26d63e8453f8086dde728af0a49b0f SHA-256: 1c24a9e9c8d7fdbfeccad5bf411f1d883352c3de48fb886e8944d2e0367f0d0d

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains an embedded URI pointing to 'trafffe.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to technical diagrams.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/123?utm_term=1988+chevy+truck+ignition+wiring+diagram PDF link annotation
- https://cdn-cms.f-static.net/uploads/4449602/normal_5fb52aaaf2ef1.pdfIn PDF document text
- https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/1057619.pdfIn PDF document text
- https://liziruji.weebly.com/uploads/1/3/4/3/134380663/fepagikifiz.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/2220911c-ebd0-415f-8e1b-00d9ae1a7d9e/7865049277.pdfIn PDF document text
- https://s3.amazonaws.com/sivanira/15487018223.pdfIn PDF document text
- https://s3.amazonaws.com/vavabi/quickbooks_training_manuals_2018.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cdc5c59a-b010-415a-9765-921c7d249158/jesagurilab.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aebcdde6-f91d-45b2-b3b1-2370544da9d1/98538763416.pdfIn PDF document text
- https://s3.amazonaws.com/gotenukevepunin/minijimobaderabutobiwi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2251e647-353b-4bef-9016-fcbca196e12f/bubble_witch_3_saga_mod_apk_latest_version.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_off0000c031.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC031	5768 bytes
SHA-256: `2c8071914ea35838ad2a42d4e80680deabd50056a40454b98dd85a52a2f8c160`
`font_01_sfnt_off0000d3ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3CE	10216 bytes
SHA-256: `443ed84e5957d53742c3157e2cb47df9f0a1a707133d8e2c6dc974573ed47f5c`

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