PDF malware analysis — malicious · 0f3de1a5cf7e2ffe

MALICIOUS

PDF

149.0 KB Created: 2021-05-21 22:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 2f01d6efabf6c86aa4156def41b8aec5 SHA-1: e8d35f9e825bef92f39e080288f83fc33ba8f057 SHA-256: 0f3de1a5cf7e2ffe11702051ba703aaa640da32e4dc9ee56884d37b31a95ed33

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and one specifically disguised as a search result for a common query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
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://zajinet.ru/strik?utm_term=what+is+1st+law+of+thermodynamics+definition PDF link annotation
- https://lobobofu.weebly.com/uploads/1/3/4/6/134680821/9981035.pdfIn PDF document text
- https://sivikowililip.weebly.com/uploads/1/3/4/5/134599649/famedekosu.pdfIn PDF document text
- https://vifejekim.weebly.com/uploads/1/3/5/3/135322606/9733029.pdfIn PDF document text
- https://delularisif.weebly.com/uploads/1/3/4/4/134482541/pawemadabuliradam.pdfIn PDF document text
- https://nuguviroguzemek.weebly.com/uploads/1/3/1/0/131070089/xopadigoz.pdfIn PDF document text
- https://ziwugedaxuz.weebly.com/uploads/1/3/4/5/134501511/8be3c6.pdfIn PDF document text
- https://lavolobaned.weebly.com/uploads/1/3/0/7/130740571/2658681.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4407085/normal_60437188eda4b.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4382187/normal_5fe34dde92cb8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4494888/normal_5fe8b9e4db8e3.pdfIn PDF document text
- https://xadamunakufadi.weebly.com/uploads/1/3/3/9/133986396/fb361.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://s3.amazonaws.com/jeworurowam/dilkes_primary_school_ofsted_report.pdfIn PDF document text
- https://s3.amazonaws.com/kizugokofo/kesovat.pdfIn PDF document text
- https://s3.amazonaws.com/tupofelasujewas/zolanosovevoke.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7cc26fe0-0f21-4d28-9a27-9e398a786723/fewovepejipojisozi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4e225aa5-ae37-4236-99c1-fe166c79412b/fawewav.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9b9f8848-d2c0-4e90-af2e-9d3d90be068e/lojedukulu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4f79660d-adb2-4ca5-ade1-aac2d006c830/gesozafovopifixifudo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0eba8031-f6a5-4109-8a63-867738ea3cc1/15326916669.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1c460e83-f510-4c74-9f23-f8ad5ae27581/world_political_map_with_names_of_countries.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001f96c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1F96C	5308 bytes
SHA-256: `a51ae48005ab51dfdebcd240e6c55e0ddc53b468effe74bb60bded81d870b065`
`font_01_sfnt_off00020b71.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x20B71	14288 bytes
SHA-256: `a16a7f49928f594d1a126399af54a97ab2165a8e547be6efd0fec609179a5f48`
`font_02_sfnt_off000238ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x238CA	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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