PDF malware analysis — malicious · 5dde8f09ff691f01

MALICIOUS

PDF

62.8 KB Created: 2020-12-19 23:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8332121341b2804d0fdde80a078850a4 SHA-1: eb53a23d6b7022d337b1288e5c5a26378fb15a04 SHA-256: 5dde8f09ff691f0153d200d4736cbfb400c70155097ac408c00b0de46cd3cc7a

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one specifically pointing to a URL associated with phishing lures ('traffnew.ru/strik'). The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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/strik?utm_term=per+capita+payments
- https://jomixemaletid.weebly.com/uploads/1/3/4/6/134659672/kuzevilovujubus.pdf
- https://static.s123-cdn-static.com/uploads/4385028/normal_5fdd90fbe3ade.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/mamibis/dugarapovofuduvo.pdf
- https://uploads.strikinglycdn.com/files/a17821e9-6590-499b-a48c-579fdfc67e3f/28788779458.pdf
- https://uploads.strikinglycdn.com/files/851ad9ad-8278-4225-80bc-9cecc85c8947/rust_destroyer_reviews.pdf
- https://uploads.strikinglycdn.com/files/d43902ec-f191-477c-9914-750fc09c996f/21529485111.pdf
- https://s3.amazonaws.com/vovopafubipu/14952942234.pdf
- https://s3.amazonaws.com/norozovijalu/gotadasuwosolotavov.pdf
- https://s3.amazonaws.com/remufuzu/nemejizatopivab.pdf
- https://uploads.strikinglycdn.com/files/7f2a4c4b-b754-4585-ac47-c98468070bf8/27618177301.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_off0000b90e.bin` `7352b75a37d654de561ea42468adde76c9056841ee8e0a4c810f4964328c6e38`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB90E	5148 bytes
`font_01_sfnt_off0000ca88.bin` `47e8860423f24f693ccdee507b407b534d180b41c69d3ce8dbe79de89ccbfd13`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA88	10700 bytes

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