PDF malware analysis — malicious · b6f5b55af2a0df13

MALICIOUS

PDF

67.8 KB Created: 2021-01-12 15:06:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 4e24d5080ac1dbf7c99c9a508325af0d SHA-1: 219649cc1e714c36a02f0ff4ae4d2f9c172a992e SHA-256: b6f5b55af2a0df134452c455d5eeb62b2cd87dcf1a812e16791ae37503b4d9e0

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'traffset.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to educational materials, aligning with common social engineering tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/aws?utm_term=aakash+aiats+question+paper+2019+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4386609/normal_5f91dea0ee68c.pdfIn PDF document text
- https://cdn.sqhk.co/vovusupa/8uPhbgf/metejusomoruge.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4407986/normal_5fefd159d6f25.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371543/normal_5f98de89a81cf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369174/normal_5f9f9d3237b63.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4407084/normal_5f9fd60339762.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4451932/normal_5fde6909896b5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420019/normal_5f9d4586d709d.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/wolina/best_graphics_card_for_vr_gaming_2020.pdfIn PDF document text
- https://s3.amazonaws.com/zoromexemuzid/nesematonova.pdfIn PDF document text
- https://s3.amazonaws.com/tugabijenovili/dufupezesu.pdfIn PDF document text
- https://s3.amazonaws.com/lijulijowivaze/teregeg.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_off0000ca55.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA55	5756 bytes
SHA-256: `7dc9aedc200ec412317c5c3b94cce578b764fdce1d709e2587af051ee8717950`
`font_01_sfnt_off0000ddeb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDEB	11784 bytes
SHA-256: `8ac32ef107510b4abffcee6afcec9083914c67c346b3c51c20a8deb9181a323f`

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