PDF malware analysis — malicious · e77e05f7481063fa

MALICIOUS

PDF

103.5 KB Created: 2020-11-11 22:07:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 6a7869c833c6079a84bf291e7b279227 SHA-1: bc86a43a7cc488a7f2b95f6f34b02d29c0f8416d SHA-256: e77e05f7481063faf0f08893c37bf766202242aaa020cc0e7b8ac1e1995cb733

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9758

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
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/strik?utm_term=cible+principale+coeur+de+cible+cible+secondaire PDF link annotation
- https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/rademisewusabanasol.pdfIn PDF document text
- https://wuriwodek.weebly.com/uploads/1/3/4/6/134688082/sugujimozame.pdfIn PDF document text
- https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/5c35e9d.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/db15e947-2b9d-4f3a-a7c3-463616436ba6/madagascar_toys_ebay.pdfIn PDF document text
- https://s3.amazonaws.com/nitatotol/muscle_building_home_workout_plan.pdfIn PDF document text
- https://s3.amazonaws.com/rujimidujek/jolexesuvugoto.pdfIn PDF document text
- https://s3.amazonaws.com/mamibis/3267138062.pdfIn PDF document text
- https://s3.amazonaws.com/jufowokedunod/langrisser_mobile_tier_list_reddit.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00015347.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15347	5112 bytes
SHA-256: `bfe7be78fc83f909ae35683d81681458a2d13a461148739901eb62688a21c30c`
`font_01_sfnt_off000164a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x164A3	13896 bytes
SHA-256: `ff3a3c03fbe316c745f45dd8b84c61731a925dcef47f82f81f5610e569cc14b0`

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