PDF malware analysis — malicious · 31d671d604c11123

MALICIOUS

PDF

70.4 KB Created: 2020-11-17 23:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04

MD5: d4f71e91841db087d0127e0b5e2d9b23 SHA-1: d673538cef46bedd44a74a68af7ca4ffca2db81d SHA-256: 31d671d604c111232ed2336fcba06302bf088ff63f884be347d888808516b1ae

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/123?utm_term=work+stress+scale PDF link annotation
- https://cdn-cms.f-static.net/uploads/4426682/normal_5f9cb68dc1cf8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4462736/normal_5fac13cdd5053.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451208/normal_5fa5d28e722ea.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375344/normal_5f8a385cbb2b7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418385/normal_5fa452e37fada.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/jadudusujuje/minecraft_command_block_creations_1.12.2.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6929db9c-1810-4b33-bf21-f1f6d7b76cbf/52289803306.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dd7f47c0-1ad1-4aee-bf0e-8322935c75c4/nupiw.pdfIn PDF document text
- https://s3.amazonaws.com/tiluwisulepam/donkey_kong_rom_set.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b9a20d61-3c39-422b-aeb1-0d088cf353b8/wikedoxojiwabekitajulul.pdfIn PDF document text
- https://s3.amazonaws.com/bikebuduvud/88263477919.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/73a9621c-d881-4dda-86e6-9900bc01868a/59748688603.pdfIn PDF document text
- https://s3.amazonaws.com/dudigonifu/darebepugelek.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_off0000d3f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD3F3	4872 bytes
SHA-256: `b34eba37ed06c26ba78f74aa46376f43e51ed942c329942b717ad3a7f27afa96`
`font_01_sfnt_off0000e4a6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4A6	11988 bytes
SHA-256: `a18cafab624a66030893dfbbd8d280cf01419e8b05e9718d9045eb64f60a8e26`

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