PDF malware analysis — malicious · c64e783812b64c6c

MALICIOUS

PDF

76.6 KB Created: 2021-02-18 06:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a04527c558bd60421286d35c3396b406 SHA-1: 7aff75819e4c74ed8be34563eba403d715dca58c SHA-256: c64e783812b64c6cfbafe87ad799fb4d06a4f7c88ff511c286efbbb19e5a33d2

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 a URL that appears to be a lure for downloading an application. The document body, though heavily obfuscated, contains text related to 'Learn russian app download' and application metadata, reinforcing the phishing pretext. No scripts were extracted, but the presence of malicious URLs and the strong heuristic detections indicate a phishing attempt.

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/strik?utm_term=learn+russian+app+download
- http://naykaryadom.fun/kibizimuwipebasalap8wc8o.pdf
- http://solimurelorobiv.iblogger.org/ledoz.pdf
- https://cdn.sqhk.co/mofijovelu/IjiiaDL/word_peak_word_search_game.pdf
- https://cdn.sqhk.co/merojuniv/gfgeLBX/play_soccer_battle_game.pdf
- http://mmamba.ru/32283637812syq05.pdf
- https://cdn.sqhk.co/kifuzopeko/g1ibSic/gisipusovijiworujavebimab.pdf
- http://detonicinitalia.website/bepamufafmzm5o.pdf
- https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/puluxewusiwi-rixuwexivigow.pdf
- https://cdn.sqhk.co/sisuriwul/caB5jee/the_survivor_rusty_forest_mod_apk.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://bomajada.epizy.com/apa_research_paper_format.pdf
- https://s3.amazonaws.com/lezerawe/agreed_upon_procedures_report_sample.pdf
- http://mesuwepuru.epizy.com/free_comic_strip_template_with_speech_bubbles.pdf
- http://mukelobader.rf.gd/dopowuvenapez.pdf
- http://xivubijorudi.epizy.com/10th_cbse_board_exam_2019_date_sheet.pdf
- https://s3.amazonaws.com/fefurorobumi/jigalalave.pdf
- https://s3.amazonaws.com/kavifunaruvi/7722470093.pdf
- https://s3.amazonaws.com/venunamazozuzo/75153466893.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_off0000f0dc.bin` `0382c863007d75c02d49ec260c270a7cde77692086f157e7d90f6e06649cde29`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0DC	4984 bytes
`font_01_sfnt_off000101f4.bin` `3f57e1c1c606c8dea70ebab1f766e8e7dee741ec768c156a59d8067e63f40381`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101F4	10476 bytes

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