PDF malware analysis — malicious · 1f82417c72e78e7a

MALICIOUS

PDF

71.0 KB Created: 2021-01-15 06:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 405171a61d0d87511d089bf8ef6c57b1 SHA-1: 81e10fed2368bd4586d781bd511d50aec06f1896 SHA-256: 1f82417c72e78e7adca50405a0863be551268566dc6cbe531f95c7ae5ca5a7d9

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs suggest an attempt to lure users to external sites, likely for phishing or to download further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

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.
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
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://ggtraff.ru/aws?utm_term=bahubali+telugu+movie++tamilrockers
- https://cdn-cms.f-static.net/uploads/4475197/normal_5fc04f38e823a.pdf
- https://site-1167978.mozfiles.com/files/1167978/36_k_binh_phap_ton_t_ebook.pdf
- https://static.s123-cdn-static.com/uploads/4472494/normal_5fecf0b98c11a.pdf
- https://cdn-cms.f-static.net/uploads/4414360/normal_5fa1198b71506.pdf
- https://murarukaxew.weebly.com/uploads/1/3/4/6/134666391/zenelime.pdf
- https://cdn-cms.f-static.net/uploads/4421641/normal_5fe6253c132c6.pdf
- https://static.s123-cdn-static.com/uploads/4379221/normal_5fca5b242ada4.pdf
- https://static.s123-cdn-static.com/uploads/4370791/normal_5ffcda89ac998.pdf
- https://cdn-cms.f-static.net/uploads/4365551/normal_5faaa3f01c046.pdf
- https://site-1174654.mozfiles.com/files/1174654/como_activar_un_chip_at_t_prepago.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- 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_off0000d71b.bin` `5c05aa7824ab8d597a34bbd4a9e769b314878e590a9f1eb431bc2ae321ff0d6a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD71B	5524 bytes
`font_01_sfnt_off0000e9c4.bin` `451c91a5d57bd3d58090b855173c2682561729e44619e67bca167454d19d8073`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE9C4	10916 bytes

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