PDF malware analysis — malicious · 41aa71b935618043

MALICIOUS

PDF

87.2 KB Created: 2021-04-07 23:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05

MD5: eeffba5850a9008589fc9d03f4085ce8 SHA-1: 57f19c4e3c6ef45c367082cb9a158c01f7a7cb11 SHA-256: 41aa71b935618043a799801f95e1f91673e33ec0efa47dd6b9ff9a523a82bb5b

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URL and the heuristic findings point to the primary function of redirecting users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 6

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 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.
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://gimoguvi.ru/123?utm_term=bowers+and+wilkins+t7+manual PDF link annotation
- https://cdn-cms.f-static.net/uploads/4367960/normal_603c3bc1c983a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490523/normal_601b9aac237ae.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413370/normal_60669eab2a091.pdfIn PDF document text
- http://pefiworawodud.mypressonline.com/characteristics_of_neolithic_revolution.pdfIn PDF document text
- http://muwiduvepobuz.mygamesonline.org/novapedupafadurilogat.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427313/normal_606611998c239.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379374/normal_601f70468ba73.pdfIn PDF document text
- http://suwadebizon.mywebcommunity.org/95233818643.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://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_32c6964e60004072a19cdd711173041e.pdf?index=trueIn PDF document text
- https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_516616611cba4d068fdd0511efa8dd98.pdf?index=trueIn PDF document text
- https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_df52466605c84b06a573d9e2d6c79448.pdf?index=trueIn PDF document text
- https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_e53e67457e244013857434ef680fb9db.pdf?index=trueIn PDF document text
- https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_fe9e3f5455a6499198bebbcd963895a7.pdf?index=trueIn PDF document text
- https://14319df0-7947-4f0d-bbb3-eaa17d5eb23e.filesusr.com/ugd/c45f38_8c066ce45d7d4943bca1f7d4679cff6a.pdf?index=trueIn PDF document text
- https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_c48295f066424219b2ef44f264f1feb5.pdf?index=trueIn PDF document text
- https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_a75e780ec924419eaf3e19b3891f472d.pdf?index=trueIn PDF document text
- https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_6fb107e61eee481c9a4b5c1c0fc47895.pdf?index=trueIn PDF document text
- http://zupitatip.atwebpages.com/puvovoxuguxokidemotebogi.pdfIn PDF document text
- https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_049df8c87d37405babe7994f7c857dba.pdf?index=trueIn PDF document text
- https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_1b42f02fe51a4815833af2fa54e37b5c.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_off00010602.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10602	5140 bytes
SHA-256: `71cd9f7842ab57b89f36df4a79b29b894090d8590a2c69e998ee56bd74386efc`
`font_01_sfnt_off0001177a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1177A	11740 bytes
SHA-256: `cd81fbdfb886f434ac5b68add9838a24f19958e331409fdf9f4ed26cb077f3c3`
`font_02_sfnt_off00013f75.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13F75	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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