PDF malware analysis — malicious · 9f4eb5b2c3c83883

MALICIOUS

PDF

61.1 KB Created: 2021-04-02 17:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a01b5e11db204266581db28e38b16b83 SHA-1: 3e7b5bea7610cafc0b60f87af3102be7e5298152 SHA-256: 9f4eb5b2c3c838838ee257e93005d6e9cbe1a64a4e7aa3e5ce50198c7390f265

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9722

Heuristics 4

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 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
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://seumenha.ru/aws?utm_term=semicolon+exercises+for+grade+5
- http://tafakiduwav.scienceontheweb.net/96099297598.pdf
- https://static.s123-cdn-static.com/uploads/4444630/normal_5fecf4b8075b4.pdf
- http://vibolofisef.mywebcommunity.org/firdous_physiology_book_free_download.pdf
- http://gubixazolela.sportsontheweb.net/60904823451.pdf
- http://nitesufi.sportsontheweb.net/boston_celtics_schedule_2020_20.pdf
- http://zarabatyivat.ru/7438214627eaze4.pdf
- https://static.s123-cdn-static.com/uploads/4426822/normal_5fe195d6f10f6.pdf
- https://cdn-cms.f-static.net/uploads/4417814/normal_60327db238694.pdf
- http://gadetebes.sportsontheweb.net/new_moon_jan_2021_pst.pdf
- http://portkamesto.site/74348107571w3qov.pdf
- https://cdn-cms.f-static.net/uploads/4421036/normal_600d6839c5bc6.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://wuvasof.epizy.com/autograph_kannada_film_song.pdf
- https://cc0b58a5-7bf4-4b41-9cd7-d9bc0cd2cc6f.filesusr.com/ugd/6dc98b_e62ccca6684f4a83a67b117730b1361f.pdf?index=true
- https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_c9ca04683fb84ef48191c8cfcd9ca640.pdf?index=true
- http://paxomutu.rf.gd/alternator_diagram_wiring.pdf
- https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_d2cc138905db4894828abedfce488b7f.pdf?index=true
- https://469ee322-798e-4c1d-9571-af6764901f97.filesusr.com/ugd/57169b_00cd3fd001544c7ca14b7318dc497d29.pdf?index=true
- http://gowepuxajotezo.onlinewebshop.net/ms_excel_advanced_formulas_with_examples.pdf
- https://203e60c5-e32a-4587-ab6d-31d66de6d5b9.filesusr.com/ugd/014c36_19050bf6847343e8b3f86a59264f9014.pdf?index=true
- http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d1b7.bin` `af71d2406461bca8ef5d71883e5e61926e56be54d38e3f504246653d64cfddef`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1B7	5636 bytes

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