PDF malware analysis — malicious · 237f67c53a32808a

MALICIOUS

PDF

68.8 KB Created: 2020-11-21 21:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 69a28e66251c50b4d282d2fbf6c06e21 SHA-1: 46d97814a5a6d9c054eb9ffc225983518432bcbf SHA-256: 237f67c53a32808af790696c05aff7b458786e48e90c1d65bcf97a3bbc411341

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a malicious document.

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://trafffe.ru/123?utm_term=software+testing+pdf+for+mca
- https://vifoxofanope.weebly.com/uploads/1/3/4/6/134670603/lixaw.pdf
- https://nikevafojo.weebly.com/uploads/1/3/4/6/134680040/dutodanoxove.pdf
- https://zumukematil.weebly.com/uploads/1/3/4/7/134716366/2139714.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/gofiguj/49510688152.pdf
- https://s3.amazonaws.com/kufazete/the_viking_spirit.pdf
- https://uploads.strikinglycdn.com/files/449f1dd8-b272-4eb8-ae0a-5c7dbe7a2f73/51061111960.pdf
- https://uploads.strikinglycdn.com/files/53fc2371-6f54-4fe4-8e8e-7ddec2a69340/zedapazomizowuruxobizuge.pdf
- https://s3.amazonaws.com/zugutixe/las_florecillas_de_san_francisco.pdf
- https://uploads.strikinglycdn.com/files/a03257b7-7c09-45b2-a339-65965ce9638e/50721747434.pdf
- https://uploads.strikinglycdn.com/files/a317dfba-0885-4e66-9945-d86d8e68bfc9/lixukufosoned.pdf
- https://uploads.strikinglycdn.com/files/ce0f3cb8-5f00-4469-9cd5-1acb1d0afd43/pabilarono.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_off0000c620.bin` `d89a2881a097c233db0003e6220d6193d487a48d5a2b5c26faab1922bb377043`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC620	5640 bytes
`font_01_sfnt_off0000d954.bin` `768b04489b9d7b315ee140d8aa0b81b56a1fbdf356dab1eece39d4d989e2ff8a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD954	14472 bytes

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