PDF malware analysis — malicious · 751f9a2b501597be

MALICIOUS

PDF

83.0 KB Created: 2021-05-15 23:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: f1cbe463360e6c760472ec1128d75829 SHA-1: a922aface52e94c8b87de17440fabde2cd457ec6 SHA-256: 751f9a2b501597be56f7d866137e6c1d29e3baf93cd1c0f44601fc4cc50cc393

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing and trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content, likely for phishing or malware distribution. The presence of a 'download' button lure further supports a deceptive user interaction.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://dugedepap.ru/strik?utm_term=hp+elitedesk+800+g1+drivers+windows+7+32+bit PDF link annotation
- https://bomaripuxizidul.weebly.com/uploads/1/3/4/9/134901287/63de8003240e39a.pdfIn PDF document text
- https://cdn.sqhk.co/gelowidabik/jOjjijb/runalifuzesudojubolatidi.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4470399/normal_5fcc08efc70cf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369525/normal_5fd7a2388af09.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387040/normal_601128fe6c2af.pdfIn PDF document text
- https://cdn.sqhk.co/rasepotobami/XlZiggi/16439985375.pdfIn PDF document text
- https://cdn.sqhk.co/xawefigi/nihEaih/hockey_games_near_me_this_weekend.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4419192/normal_60446ef31b3db.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4461773/normal_606a336dbd642.pdfIn PDF document text
- https://toxobeveja.weebly.com/uploads/1/3/1/4/131437160/joxanutigij.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_98461e6406694a589f4504c5aa3074a3.pdf?index=trueIn PDF document text
- https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_1cbb74efa1304ecb8ebe1ced8b7e47d6.pdf?index=trueIn PDF document text
- https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_65ee7864336548baa944326dab545015.pdf?index=trueIn PDF document text
- https://81d89a68-18ac-4cf1-ad00-ddd5d2f7da41.filesusr.com/ugd/ed58ef_14c1cc34a8624fa085dccfe0db3bd7d4.pdf?index=trueIn PDF document text
- https://0115c081-d8bc-4983-a705-81db93bf1442.filesusr.com/ugd/990402_b942fc5540264c4b8a99c82d85de321a.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f565.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF565	5788 bytes
SHA-256: `a6838acc5349f27a2f2413eef46fd76409a4ce4ddf21d80e95d8c5b162a98d52`
`font_01_sfnt_off0001093d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1093D	11816 bytes
SHA-256: `7137c4b991cb9b1c2c99fbeb90c613bc2adfc7d0da1c3f2eb0274a59d8a7f645`
`font_02_sfnt_off000130ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x130EF	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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