PDF malware analysis — malicious · 4f9109885bbc5f21

MALICIOUS

PDF

74.9 KB Created: 2021-03-31 23:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5efc92c46bffbcdb01c79b50933de7d1 SHA-1: 5dcdc280726ba6d98923e7ebf9e43dbf7be47f02 SHA-256: 4f9109885bbc5f21b5df7b0c00d68ad5c7355589575ee8c47d778c4156d5bb77

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to zajinet.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to hotel information, aligning with common phishing tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
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/award?keyword=list+of+5+star+hotels+in+dubai+pdf
- https://cdn.sqhk.co/genonitag/Cojeja1/kidumikugodogekegolotu.pdf
- https://cdn.sqhk.co/fikalibumi/ichenjd/vulavumosimewuvepo.pdf
- https://cdn.sqhk.co/kinanekoxo/5WPz6ji/90361883612.pdf
- http://nexipufogavajid.getenjoyment.net/pdf_editor_online_delete_text_free.pdf
- http://wovogabaposexe.22web.org/arena_of_valour_mod_apk.pdf
- http://lnstagram-copyright-confirms.com/meragukewijoluvararimreacp.pdf
- https://cdn.sqhk.co/lomasamube/fhajdjE/39841400223.pdf
- https://cdn.sqhk.co/kodivitedi/7QRSgcD/brawls_of_steel_apk_mod_hack.pdf
- https://cdn.sqhk.co/wasefago/BBxIQhb/dragon_quest_minecraft_games_in_order.pdf
- https://cdn.sqhk.co/zalenemu/qUFQgih/52056930946.pdf
- https://cdn.sqhk.co/pejinijew/ZGgfkvN/one_punch_man_workout_weight_loss.pdf
- http://lisuzigerob.mygamesonline.org/latibitoveni.pdf
- http://polnews.xyz/how_to_sketch_a_graph_using_ymxcxipvs.pdf
- https://cdn.sqhk.co/mobirewin/20hihfg/golem_calculator_for_king_of_avalon.pdf
- https://cdn.sqhk.co/reparepoki/ijHjiie/50285675957.pdf
- http://sivixezugi.iblogger.org/how_do_you_change_the_code_on_a_schlage_keypad_door_lock_without_programming_code.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://pilukakir.epizy.com/dutinebukitotuzegir.pdf
- http://zuwarikufaz.epizy.com/napiwemizax.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_off0000e7b5.bin` `c8b4c066bf6365de2d110a8b1cb79e334ed6f3b2da1e07143638e810f4cef7d7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7B5	5336 bytes
`font_01_sfnt_off0000f9d5.bin` `db94635b96bec1e7138c668c6dcdc0fed99452db917ca90524843769b60d4a8d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9D5	10848 bytes

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