PDF malware analysis — malicious · 332824e76393d08b

MALICIOUS

PDF

69.9 KB Created: 2021-03-11 20:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5b98699720567ff2861ff63d088be0ce SHA-1: c8df13bd40c9402342cb1e25d63503d75745d9b1 SHA-256: 332824e76393d08bdea927e7813ee2d11feae82231ea5683c88a7e0254b54ce5

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'nipisod.ru', which is likely a lure for downloading malicious software, disguised as an AVG antivirus APK. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and creation dates, suggesting it was programmatically generated to host the malicious link.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/123?utm_term=avg+antivirus+apk+uptodown
- http://vukogosapejofa.iblogger.org/automation_anywhere_software.pdf
- https://cdn.sqhk.co/wadebekop/ijdifk0/gemulekipebifawemoxelaj.pdf
- https://cdn.sqhk.co/xuxovunevo/XfqXX7D/bed_wars_server_ip_1._8._9.pdf
- http://vazowutufodibaw.22web.org/99677661363.pdf
- https://cdn.sqhk.co/tezuzerise/d3Yfger/65485964593.pdf
- http://kivimuxalusis.22web.org/24475402354.pdf
- http://rebemelo.22web.org/919402473.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://xegiseko.epizy.com/bufitajotize.pdf
- http://gevorewububew.epizy.com/naa_autograph_all_songs_free.pdf
- https://s3.amazonaws.com/wefadep/aaa_abdominal_aortic_aneurysm_guidelines.pdf
- https://s3.amazonaws.com/xupimaral/gobun.pdf
- http://fixuzobimube.epizy.com/td_ameritrade_roth_ira_application.pdf
- https://s3.amazonaws.com/xedewofuretujo/59757427066.pdf
- https://s3.amazonaws.com/pugomonapoxuxe/piguzenopelinupilajurijax.pdf
- http://zejagal.rf.gd/best_games_for_couples_to_play_android.pdf
- http://bejovivijif.epizy.com/zopivivetulos.pdf
- http://tasukifuputuf.epizy.com/a_boy_called_bat_guided_reading_level.pdf
- https://s3.amazonaws.com/kagedatabujo/best_hd_wallpapers.pdf
- http://pofabavulaxeli.rf.gd/short_biography_sample.pdf
- http://gepikadagutuv.epizy.com/diploma_certificate_template.pdf
- https://s3.amazonaws.com/zasepo/chest_guidelines_vte_prophylaxis_2016.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_off0000d635.bin` `bbe6317d20b523960e5b3e78d1fa303ad687b43a97b64e9ffdf474274ceee9a9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD635	5300 bytes
`font_01_sfnt_off0000e868.bin` `f820e55d34f2298edb8eecd3d7f72cfef5dbf500b47d147b9a97cb9590f19768`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE868	9936 bytes

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