PDF malware analysis — malicious · 1c3bff09a49fec33

MALICIOUS

PDF

119.8 KB Created: 2021-03-28 13:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a1d22711133d4d3776f725ffda2b35e2 SHA-1: 296f41cd65b51aa05f4a661265e068f31e87316c SHA-256: 1c3bff09a49fec331378300329a38b6a9d3e1d520f5b7bdce3011de299c6ea62

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains multiple embedded URLs, one of which, 'https://jumiwimov.ru/123?utm_term=counter+strike+1.+6++windows+7+free', appears to be a lure for downloading software. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site, likely for further payload delivery.

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://jumiwimov.ru/123?utm_term=counter+strike+1.+6++windows+7+free
- http://8bitbeardsco.com/24983446571bkgzv.pdf
- http://bomepufibawil.scienceontheweb.net/lokadowaxifozezilopekuxo.pdf
- http://ottics.ru/deemo_mod_apk_3.3.1s5i74.pdf
- http://yourcy.com/36936882881a8r74.pdf
- http://kaxavetaxudu.mywebcommunity.org/nanezajarewi.pdf
- https://cdn.sqhk.co/kivipemo/Coljfza/20686375296.pdf
- https://wogijelagorezu.weebly.com/uploads/1/3/4/0/134096035/dusekujufugosowewuj.pdf
- http://kapusta.pro/vugumatotonivokonfemdz.pdf
- https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/a558d410f.pdf
- https://cdn.sqhk.co/koxixoneto/gghjf6Y/pixel_worlds_admin_tools_hack.pdf
- https://dotomogef.weebly.com/uploads/1/3/4/7/134760479/gigibuxad.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://kuxoxulid.epizy.com/80296464279.pdf
- http://jikapepikedamum.epizy.com/40643572708.pdf
- https://s3.amazonaws.com/baxekojojexusol/21134563215.pdf
- http://xanedemu.onlinewebshop.net/74278339818.pdf
- http://revudipepofaten.myartsonline.com/present_perfect_for_since_exercises.pdf
- http://wukazuvogupe.epizy.com/jetoru.pdf
- http://gegenig.epizy.com/itau_unibanco_holding_annual_report.pdf
- https://s3.amazonaws.com/kisimujuk/63776353098.pdf
- https://s3.amazonaws.com/muxegeza/baby_doll_punjabi_video_song.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_off00018640.bin` `a977a86aa5c44b0cb3d75d1ce42a98084cefba8123a1c5d29b47a15e48b63c66`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18640	5036 bytes
`font_01_sfnt_off000197a1.bin` `34d6a1ee95cb4b53382fed595fe8d296bb6b740a9747cd2442cfc342fe0a3090`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x197A1	20924 bytes

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