PDF malware analysis — malicious · ffb33641b2604ba5

MALICIOUS

PDF

81.0 KB Created: 2020-11-13 03:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0f22a76e9cf5117412057ee245d8aa23 SHA-1: 18094f0f6505d1e130734334c6bcc30d08691711 SHA-256: ffb33641b2604ba5f451eacb098a78ce467db95897448475e3d3db42b7e9782e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to S3 buckets and other domains, suggesting a link farm or redirection mechanism. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics, along with the 'PDF_SEO_LINK_FARM' rule, indicate malicious intent. The document body, though heavily obfuscated, contains a URL that appears to be a lure, likely intended to redirect users to malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/123?utm_term=naruto+nine+tailed+fox+form
- https://cdn-cms.f-static.net/uploads/4460678/normal_5fa8d31ec6070.pdf
- https://cdn-cms.f-static.net/uploads/4367013/normal_5f8a9c47858a4.pdf
- https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lorewuk.pdf
- https://zeburunonuf.weebly.com/uploads/1/3/4/4/134458398/ecae75c7fc.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/wisatutadi/joker_2019_free_online_fmovies.pdf
- https://s3.amazonaws.com/kasuwevovog/netumap.pdf
- https://s3.amazonaws.com/mipizaju/jedafikemovepaxidigonare.pdf
- https://s3.amazonaws.com/saziwijaxodav/xukupulenoxazugube.pdf
- https://s3.amazonaws.com/tetazino/adding_subtracting_fractions_worksheet.pdf
- https://s3.amazonaws.com/nabifovu/bully_apk_with_cheat_menu.pdf
- https://s3.amazonaws.com/vifusupegiza/melrose_public_schools_summer_reading.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f61d.bin` `363a37624909b69a3fda9f97e270c6c92047e721ea31eb5cd73b6141b9ef519c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF61D	3228 bytes
`font_01_sfnt_off00010197.bin` `9ecae9e74362aef5e71f5529735b528d65675e024d64464828cb64d18fef9545`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10197	4912 bytes
`font_02_sfnt_off00011243.bin` `b8feae3c49b9a3350579c8e1095e0d9c9af7b83ce2a2a500b28443b3ed094047`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11243	10728 bytes

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