PDF malware analysis — malicious · 2888f4fe8f5ed4f0

MALICIOUS

PDF

72.6 KB Created: 2021-01-14 23:32:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b350d1e11b872018b4136aa5298323f8 SHA-1: b3b76742b36053c22df80484179a81cad3105689 SHA-256: 2888f4fe8f5ed4f0213dbec08996c7881a7832ee4a5ede58b18a3a1f7582a884

214 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure and a large number of SEO-manipulated links. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were extracted, the extensive use of external links suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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=polarizer+sheet+in+lcd+tv
- https://cdn.sqhk.co/susotizakaxe/Ujcqg7t/cartoon_gadi_race_cartoon.pdf
- https://cdn.sqhk.co/bixatavafut/IjcQGhj/pirinididaguvulasop.pdf
- https://cdn.sqhk.co/gawagunikuw/jjygjqx/the_environs_survival.pdf
- https://teniroge.weebly.com/uploads/1/3/4/6/134693228/1885898.pdf
- https://site-1178709.mozfiles.com/files/1178709/ant_simulation_3d_full_apk_free_download.pdf
- https://cdn.sqhk.co/silakozafi/MQiaVKr/nagori.pdf
- https://dokakida.weebly.com/uploads/1/3/1/3/131380589/wolotanezogo.pdf
- https://kowalarezanir.weebly.com/uploads/1/3/1/4/131438161/xuxoputogawoxaj.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/regovadeje/wuloxe.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_off0000e07d.bin` `b50e21d4d478ece40973a33c5561e48692cfa4ccadcab23ec3b44b01bfe75b35`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE07D	5136 bytes
`font_01_sfnt_off0000f1fa.bin` `538a66a679a29115a69df63c8cf8498fcd7c08fefcdbf7dda48508119ff25405`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1FA	10756 bytes

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