PDF malware analysis — malicious · 74c86b4352367bba

MALICIOUS

PDF

73.8 KB Created: 2020-12-28 06:19:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02

MD5: d0e8802bf578cf6742f689e273de5242 SHA-1: e9feb08dc5461c3ca633cc77db87ebdab70fcfa1 SHA-256: 74c86b4352367bba2c44d961208d6d1a567487dc76d3f42e8b3f0c4c4756e2b9

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI, 'https://trafffi.ru/aws?utm_term=acog+guidelines+for+pap+smear+frequency', was extracted, suggesting a phishing or malware distribution attempt. The PDF structure and embedded URLs indicate it's likely used as a lure to redirect users to malicious content.

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://trafffi.ru/aws?utm_term=acog+guidelines+for+pap+smear+frequency PDF link annotation
- https://cdn.sqhk.co/bebetirifam/hgZhbjf/jesetubepodajede.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4415081/normal_5fe2586596f14.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367680/normal_5fa6d04767b0d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4428331/normal_5f9cb83b588ca.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381544/normal_5f9db17e109b7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370317/normal_5fb4d5e5f0a47.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/0a46f42e-6b4f-4a4c-925e-809e929da3b5/kipov.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c4e9549a-92d9-4cc1-ad11-fe227895ddff/celery_experiment_worksheet_ks2.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f90023d5-e5f1-4ef0-8868-1da5ef46a53d/zewanufe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9e6697a9-e968-4091-9441-f71792d2f45b/act_of_toleration.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_off0000e318.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE318	5692 bytes
SHA-256: `37d6e551870749a12783abd530f2d6552bdfa5ea995e71446c1c4c7ea0ebdd56`
`font_01_sfnt_off0000f667.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF667	10688 bytes
SHA-256: `499af9a5571913e8ae53d5d1430509e45502b429c12532fe8b8cf61a7d72762f`

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