PDF malware analysis — malicious · b989dffce9615e16

MALICIOUS

PDF

70.6 KB Created: 2021-01-10 11:34:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 78c604490b52901f56575fd91d5353ef SHA-1: b3264e6699d323f1951e42d93b2c3dfa3b1839a5 SHA-256: b989dffce9615e165d33492795e8dbf576d60136972482e68e8cf5bf012f05d3

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt disguised as a game application. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristic firings point towards a phishing lure designed to redirect users to malicious infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 0.9979

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
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://cctraff.ru/123?utm_term=torture+chamber+game+app In PDF document text
- https://duvupobilalef.weebly.com/uploads/1/3/4/6/134630448/8715bf584.pdfIn PDF document text
- https://site-1166598.mozfiles.com/files/1166598/purple_hearts_emoji_meaning.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495254/normal_5fbf605fd5ea7.pdfIn PDF document text
- https://soxagunolipug.weebly.com/uploads/1/3/4/8/134887217/67448312a7a.pdfIn PDF document text
- https://site-1172629.mozfiles.com/files/1172629/32982666244.pdfIn PDF document text
- https://site-1172122.mozfiles.com/files/1172122/nifanazaxusixurodujawor.pdfIn PDF document text
- https://biduvokiket.weebly.com/uploads/1/3/4/3/134367510/5429519.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/gajejasa/fenomeno_de_migracion_placentaria.pdfIn PDF document text
- https://s3.amazonaws.com/jolituzoji/ginewobataxinibawewur.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_off0000d727.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD727	5228 bytes
SHA-256: `86b4f315fbeaa2d7ad52239b7370392908dba104af38f6e934165fac80551ad0`
`font_01_sfnt_off0000e8c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8C7	10908 bytes
SHA-256: `ed3fc3fdfb5d89465fea5aaca61cedbdf94bbd6785bf6fae1c0faae7ee19ffe0`

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