PDF malware analysis — malicious · 75369d8922cb05cc

MALICIOUS

PDF

67.4 KB Created: 2020-12-16 21:12:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 65f4a6ee7405e1df76739d3216400ab2 SHA-1: b6538bca7ab87a6564c77f989a88d885eae836ff SHA-256: 75369d8922cb05ccccc91fb4cf362b2b8ac9e2dcb94d65f8e049072314ce88d0

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URL pointing to a suspicious domain, identified by heuristics and ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious documents.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/strik?utm_term=leslie+hannah+belle PDF link annotation
- https://cdn-cms.f-static.net/uploads/4390052/normal_5f9341daad438.pdfIn PDF document text
- https://vozunekoba.weebly.com/uploads/1/3/4/9/134902797/budojilenobumasoli.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366385/normal_5fc1f7bb43224.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/8095a1b4-a71f-4001-9ab6-332b9aee7363/44446026668.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e45a85e1-c0c3-49dd-8aa3-7d30d9d49125/coffee_prince_9vo0.pdfIn PDF document text
- https://s3.amazonaws.com/widiku/hay_day_hack_apk_without_human_verification.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/024bae5e-3be9-4c46-a2bd-e0592fd6e734/82061611356.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d2a90870-7101-4431-af02-a4ef42d26c61/fivumoxo.pdfIn PDF document text
- https://s3.amazonaws.com/falevi/xodosalarukipapitow.pdfIn PDF document text
- https://s3.amazonaws.com/zafaronivaj/ecocardiograma_normal.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_off0000cd6a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD6A	4756 bytes
SHA-256: `085ebd3bc63fdf31aa53ffaa089f7409cf16d16a3ed859c48fd3b82b6f2d18e1`
`font_01_sfnt_off0000dd92.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD92	10364 bytes
SHA-256: `1c943274e48cee7760aa43614805d31cdf119cd5910dbe190b2cfb32bae23b91`

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