PDF malware analysis — malicious · bf7ae55125ac7f8b

MALICIOUS

PDF

68.6 KB Created: 2020-12-22 19:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: f2a3cfc2ac25ba291e3f984f9778543c SHA-1: ee3bb997363ce2974f7507365f9a124ebb070412 SHA-256: bf7ae55125ac7f8b0266e5899d34282f9c2810c937735bb265683cb6a684caa0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the primary goal is to drive traffic to external, potentially malicious, domains.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/strik?utm_term=tvet+policy+and+strategy+in+ethiopia
- https://cdn-cms.f-static.net/uploads/4375702/normal_5f941cd47aedd.pdf
- https://fenatelelopowi.weebly.com/uploads/1/3/4/5/134510159/8aeb0d8a37f93.pdf
- https://static.s123-cdn-static.com/uploads/4415951/normal_5fc9a5a27ffec.pdf
- https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/9855210.pdf
- https://cdn-cms.f-static.net/uploads/4489615/normal_5fd1d21bcccdb.pdf
- https://cdn-cms.f-static.net/uploads/4366028/normal_5f941d41502bb.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/pegozegi/company_of_heroes_2_british_forces_guide.pdf
- https://s3.amazonaws.com/wokesabisevo/gonanuduni.pdf
- https://s3.amazonaws.com/gifojuxaxeva/video_player_online_android.pdf
- https://s3.amazonaws.com/salosibejodod/wowinawodanudajid.pdf
- https://s3.amazonaws.com/rujimidujek/made_with_love_bridal_size_guide.pdf
- https://s3.amazonaws.com/wegemebufojafak/59789942529.pdf
- https://s3.amazonaws.com/ratixifo/221167746.pdf
- https://s3.amazonaws.com/remuv/classical_guitar_sheet_music_collection.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_off0000cfa4.bin` `924c016857f7dbab563bd212b4bba5c5c99a1b7b49ee77094d6489059660a3a0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFA4	5444 bytes
`font_01_sfnt_off0000e231.bin` `451dccc0a734a1d79e2ed33ed72fecdbe9759e60f3f799cccfd3e7d7bb4bc372`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE231	10236 bytes

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