PDF malware analysis — malicious · e8a25f428ecd59a1

MALICIOUS

PDF

77.7 KB Created: 2021-04-29 22:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: c3c0467af39bdd89b0560e8172634180 SHA-1: 7f7378a69f73e4fc8571dfcaebec5f09bb8f1431 SHA-256: e8a25f428ecd59a1d1c1bcfdad0e5cd25f6dcab34fb0e2fb073ce7d22a78b17e

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains a large number of external links, many hosted on disposable domains, designed to redirect users to various content, including what appears to be a fake Apple certification login page. The document body is heavily obfuscated, but the presence of numerous SEO-optimized links suggests a link farm or phishing campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

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.
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=apple+certification+system+login PDF link annotation
- https://cdn.sqhk.co/pamezuravuno/jgfjc04/dragon_pass_app_natwest.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4372360/normal_60077212ab836.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4377408/normal_60069f49a3446.pdfIn PDF document text
- https://faxilazow.weebly.com/uploads/1/3/4/7/134725206/bowajovozomubamakisa.pdfIn PDF document text
- https://zafapuguma.weebly.com/uploads/1/3/2/7/132712217/eef9bb21d2307f8.pdfIn PDF document text
- http://kevifiregerufug.scienceontheweb.net/zaxuladivepisiri.pdfIn PDF document text
- https://rezosegog.weebly.com/uploads/1/3/2/8/132814067/gatijuratinazos-resexelopadoxef.pdfIn PDF document text
- http://rirarojafetojep.iblogger.org/42375201943.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368500/normal_600dfb8f4fc5e.pdfIn PDF document text
- http://pibarulajido.getenjoyment.net/dimepuvowaz.pdfIn PDF document text
- https://zigamebujadosa.weebly.com/uploads/1/3/4/7/134745820/kofuxepuvine-suvikav-loromuwilizolup.pdfIn PDF document text
- https://degezumibupupek.weebly.com/uploads/1/3/4/8/134862322/cecc67b133d229e.pdfIn PDF document text
- https://cdn.sqhk.co/xaranoraf/jekUihL/nfl_news_scores_today.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
- http://dujaretikujufe.epizy.com/beginner_crossfit_workout_plan.pdfIn PDF document text
- http://sojoxorizupeza.rf.gd/dell_latitude_e5400_specs.pdfIn PDF document text
- https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_53b9641e744d4d2f9dc60ead8907c435.pdf?index=trueIn PDF document text
- https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_61193570a9e442958988eff684738dfa.pdf?index=trueIn PDF document text
- http://pepebejawu.epizy.com/72095704392.pdfIn PDF document text
- https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_d0ad7ffa03614c6380f761772eba5edd.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_off0000e52f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE52F	5216 bytes
SHA-256: `25ee80fcc9393bcbc11d39278217723dac4992dc38f793e79d50dd7530702e02`
`font_01_sfnt_off0000f6d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6D3	10660 bytes
SHA-256: `fe28702a4b5c009c54c4361605b2f59fce67f03f04a98412f024bf7b551cdcb5`
`font_02_sfnt_off00011b3a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B3A	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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