PDF malware analysis — malicious · 367b1cf98b2442fd

MALICIOUS

PDF

68.0 KB Created: 2021-01-11 12:51:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 49c74c46cab840724f1aec9ee70a2b1b SHA-1: 7c34b48474ff6428ddaf6e58d847655c21455646 SHA-256: 367b1cf98b2442fd3ea83f55f0746e632a1ca117f1ceac3bd417a0a784e56542

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL is disguised with text that suggests it is related to academic answers, likely to trick the user into clicking. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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://gettraff.ru/123?utm_term=blood+pressure+virtual+lab+answers In PDF document text
- https://cdn-cms.f-static.net/uploads/4482853/normal_5fc317dbf158f.pdfIn PDF document text
- https://cdn.sqhk.co/kesufetumo/fPDhiLa/66140114770.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365621/normal_5fd3d63c3b9c2.pdfIn PDF document text
- https://vobiromab.weebly.com/uploads/1/3/4/6/134653190/zovixageja.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372377/normal_5fc11bdb163d3.pdfIn PDF document text
- https://fofumizuzel.weebly.com/uploads/1/3/2/7/132740209/8351732.pdfIn PDF document text
- https://jutebipofan.weebly.com/uploads/1/3/4/3/134334370/dovomoner_varoponiza.pdfIn PDF document text
- https://cdn.sqhk.co/jeposanop/eheJidm/tie_dye_hoodie_mens_uk.pdfIn PDF document text
- https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/1234180.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ceae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEAE	5292 bytes
SHA-256: `f383281b1dcd1917e3f2054579e2dadb26b6bcf49196907a5b68104163fed3bd`
`font_01_sfnt_off0000e0cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0CD	10140 bytes
SHA-256: `6f9b6d140ac3478fee32651c0d8c5d8914fc3294362a550f711dd673fd3ba1ac`

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