PDF malware analysis — malicious · 28947e446258aaab

MALICIOUS

PDF

77.8 KB Created: 2021-05-10 19:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2b504155ef016bfd2cf439a38a0ba8f4 SHA-1: c12bc843fa39664a38ee0349ffb7b593ddc2f70a SHA-256: 28947e446258aaabbffe6c82ac296583a4e2b4ba541bcc370d74b4bae9550c26

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL disguised as a helpful guide. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL, https://jacksth.ru/wb?keyword=how%20to%20join%20two%20wooden%20planks, is the primary indicator of compromise, suggesting the document is a lure to direct the user to a malicious site.

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://jacksth.ru/wb?keyword=how%20to%20join%20two%20wooden%20planks
- http://itdiscount.info/pinoy_movie_2k_netxnfym.pdf
- http://policyhelpcenter.com/30_day_gratitude_prayer_guide1dbpv.pdf
- http://unityfree.xyz/namikerumuzewiblq29.pdf
- http://dfahsdfgjsfg.online/dora_malayalam_cartoon_video_free_downloadcrmec.pdf
- https://cdn-cms.f-static.net/uploads/4419629/normal_601aa7efbd9a0.pdf
- http://fetedeju.mygamesonline.org/rajotinazuwukobiribut.pdf
- https://cdn-cms.f-static.net/uploads/4420906/normal_60554fb3beb4d.pdf
- http://fokefetebebinin.66ghz.com/nozixalozemolefisebura.pdf
- https://static.s123-cdn-static.com/uploads/4382773/normal_5fee3e146b5f7.pdf
- http://kvrovk.xyz/903428293525xta7.pdf
- http://blankid.ru/48858733345743pw.pdf
- https://cdn-cms.f-static.net/uploads/4480585/normal_606089018ffc1.pdf
- http://agentsecure.space/mubiditobefutarimileg0.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://kadizilurojiniz.onlinewebshop.net/apache_ranger_user_guide.pdf
- http://vegunag.rf.gd/zepedorosivuruzejofazenop.pdf
- http://tujatubaniza.epizy.com/optex_vxi_am.pdf
- http://sovotovagito.epizy.com/basic_accounting_concepts_in_telugu.pdf
- http://jitawidavez.atwebpages.com/metabolismo_de_aminocidos_bioquimica.pdf
- http://runexodaluxova.epizy.com/16078656165.pdf
- http://zixadadafupeg.epizy.com/rpg_open_world_games_for_android_offline.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_off0000f49a.bin` `218bf4cd6eeeca88681968a056c7dc86e2ce99402f1da9e77e0e16b52cbb4b19`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF49A	5052 bytes
`font_01_sfnt_off000105eb.bin` `be5cd9cbb4c3ae8cd04f90a0aac3167a5d6588be0196d0a6f6c84a3a4b91acd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x105EB	10608 bytes

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