PDF malware analysis — malicious · 440b794d33b56cd4

MALICIOUS

PDF

66.2 KB Created: 2020-12-15 12:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 87a2c8f33818e110cb4e32553ad12b86 SHA-1: 6d7d6484e8e348670d4184690813531733a66b00 SHA-256: 440b794d33b56cd4c018eb45f8a86056b606eb6eef2e473f16814812f7b05460

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to 'traffine.ru', which is likely part of a phishing or malicious content delivery scheme. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI and the malware detection strongly suggest a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=what+makes+a+meso+compound PDF link annotation
- https://cdn-cms.f-static.net/uploads/4503533/normal_5fbb95a0aaef6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451927/normal_5fb780b6917f2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374374/normal_5fb9d750293e7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466135/normal_5fbf1e3a32980.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4467586/normal_5fb4fc3967c80.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389606/normal_5fa6c59789b6d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378160/normal_5f918d21c0f23.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495050/normal_5fb6b5fc0e449.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/xijalovelokolep/choices_hacked_apk_free.pdfIn PDF document text
- https://s3.amazonaws.com/migivewuwe/maxuwusufodovixetamu.pdfIn PDF document text
- https://s3.amazonaws.com/tanikanaw/58286728956.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_off0000c453.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC453	5264 bytes
SHA-256: `a96cd800ad6700e9be379b709fdf371d20f89c45fbad77e05a74f06dd5a3c869`
`font_01_sfnt_off0000d621.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD621	11236 bytes
SHA-256: `8d99411cb83faa072f265461df7de56fda0e28aa4fbd843b2980e3eba95d420c`

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