PDF malware analysis — malicious · 658c10b380f33752

MALICIOUS

PDF

59.5 KB Created: 2020-11-10 17:28:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 103db5b01cac1f6d0e6ab4c7f8ba7eac SHA-1: bfb5a34fef21d981079b7ab80157c4d44c75a1d8 SHA-256: 658c10b380f33752cf0761a0e15134aa74fb8ae6b6c4e3d20882869c0cbab5b8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains a large number of external links, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains a URL related to 'bowling games unblocked', which is likely a lure to direct users to malicious or deceptive content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://trafftec.ru/123?keyword=bowling+games+unblocked
- https://cdn-cms.f-static.net/uploads/4377938/normal_5f9cf43f5fe9b.pdf
- https://dubitofux.weebly.com/uploads/1/3/4/4/134458445/7654595.pdf
- https://cdn-cms.f-static.net/uploads/4461232/normal_5fa9b623caf8c.pdf
- https://cdn-cms.f-static.net/uploads/4380674/normal_5f8f433b19b40.pdf
- https://cdn-cms.f-static.net/uploads/4375339/normal_5f95a64098181.pdf
- https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/f6ff4c.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/likadojivivofu/ash_grove_high_school_football.pdf
- https://s3.amazonaws.com/ruzumeb/install_malwarebytes_free_edition_filehippo.pdf
- https://s3.amazonaws.com/tipikaxe/occupational_health_and_safety_act_poster.pdf
- https://uploads.strikinglycdn.com/files/fc764c02-983c-487a-9ebe-b9fbadff00a1/zujalitoxabesume.pdf
- https://s3.amazonaws.com/gixawetopoli/manual_aptana_studio_3_espaol.pdf
- https://s3.amazonaws.com/tezude/zumorikawiromapumenifube.pdf
- https://s3.amazonaws.com/rizezobabub/fisaxipi.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ac10.bin` `0667117db7778394781f1d4827b84fb2e6a6af4aeff72e7802cb80f23d698318`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAC10	5508 bytes
`font_01_sfnt_off0000bed0.bin` `47b914c0a2b9c02aad674948d6c2341b9f5881baeb59e1e6d2d1cf4db7a6f569`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBED0	10224 bytes

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