PDF malware analysis — malicious · ef73be0c4063bcb1

MALICIOUS

PDF

79.7 KB Created: 2021-05-15 16:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 882d059a4888e230007a5204c3f49c9c SHA-1: 9bf092b5bc369ba439e89551a32d4772cc5e533f SHA-256: ef73be0c4063bcb155601c2a8e0bb8b7635b6658e7502c48d2c0bad1dc7b72cf

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'zajinet.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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=murray+12+hp+38+riding+mower
- https://cdn.sqhk.co/ponatabet/hdegege/varifefekuxu.pdf
- https://cdn.sqhk.co/xonipavu/hibiiab/98515646785.pdf
- http://papotupeti.iblogger.org/97362312386.pdf
- http://wisatemubudu.medianewsonline.com/restraining_order_texas.pdf
- https://cdn.sqhk.co/rajunakeb/xuhh0ay/homeschool_schedule_kindergarten.pdf
- https://cdn.sqhk.co/tivinarafuvu/Njb2RFv/vender_recargas_movistar_el_salvador.pdf
- https://cdn.sqhk.co/rijakobebux/hcjahdb/heart_starts_beating_fast_when_i_stand_up.pdf
- https://cdn.sqhk.co/winogolelog/ihughhb/25450297295.pdf
- http://gigezesuzobe.getenjoyment.net/80611177428.pdf
- https://cdn.sqhk.co/zudusidesu/ihuFCgd/drawer_runners_undermount.pdf
- http://vowitufafuzebil.scienceontheweb.net/piano_scales_arpeggios_and_broken_chords.pdf
- https://cdn.sqhk.co/gopilufifeda/bKAjejg/ronefakupod.pdf
- http://pisozuzata.iblogger.org/rizanoxusej.pdf
- https://cdn.sqhk.co/xumefotebe/O6ez7gj/mozebafemofuj.pdf
- https://cdn.sqhk.co/pulizojiwim/hbja1Am/95075092396.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://rajunuximu.epizy.com/lowrance_hook_3x_review.pdf
- http://kugefosames.rf.gd/ammonification_process.pdf
- http://zozoresupiz.epizy.com/47682585392.pdf
- http://masidurexo.rf.gd/poxamikarazobefadeguz.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f7c2.bin` `b6b532e71f47738b1d079c4a7bd00b848f760d60ddb09b4c5e55afe2461a11dc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7C2	5904 bytes
`font_01_sfnt_off00010bd8.bin` `6011805379790a2ce8251b4d8337a258c6735610cadb9bea210f6c6f13eb90ba`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BD8	11136 bytes

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