Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9d7bb31c3135a0…

MALICIOUS

PDF

89.1 KB Created: 2021-04-01 19:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51df3b8312c3dadd268c515d78f2c816 SHA-1: 2f9408bff9cf8db38b12afd2091463f3d5df01fd SHA-256: 7d9d7bb31c3135a016d82afd65d75d32961f9f27781d24887ded7296083a75d3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URL that leads to a phishing page disguised as information about weight loss. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/strik?utm_term=can+you+lose+weight+from+detoxing
    • https://cdn.sqhk.co/ragonujip/cCtjexr/clash_of_clans_ultimate_gems_and_coins_generator.pdf
    • https://cdn.sqhk.co/xugiwatokax/hHiaKic/chief_architect_premier_x11.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://949217f6-ecfc-4a1b-8806-967b2a145102.filesusr.com/ugd/b08fd2_3a12173990d9493ea8ca07da4f4afd28.pdf?index=true
    • https://s3.amazonaws.com/migivewuwe/vodixejusuji.pdf
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_d5b9554d3d864522b3a00ce948df6874.pdf?index=true
    • http://bikikifuxax.epizy.com/86024716930.pdf
    • http://pobevejilu.rf.gd/caverna_board_game_rules.pdf
    • https://uploads.strikinglycdn.com/files/3cc06b1f-c3dc-4fbc-a681-179c439fefa4/41807125792.pdf
    • https://uploads.strikinglycdn.com/files/dc86cef5-77b9-41be-8d35-bca41659973b/robert_graysmith_zodiac.pdf
    • https://s3.amazonaws.com/potamotaz/chinese_character_to_pinyin_app.pdf
    • https://uploads.strikinglycdn.com/files/852b5403-8043-460c-ac01-ba6038d07762/66425639501.pdf
    • https://uploads.strikinglycdn.com/files/a7daa8cd-a140-4984-9578-7ed990af0d40/velagem.pdf
    • https://e62d90d9-845b-491d-b9b1-804d55ccd6e6.filesusr.com/ugd/6af1ed_5e5b5a8956c84d59a6659471e8697dbb.pdf?index=true
    • http://pizubape.rf.gd/piropexete.pdf
    • http://xezujuwevan.epizy.com/bepoje.pdf
    • http://vokunewegulu.epizy.com/ararara_marathi_song_free.pdf
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_8ddd60c1e2e44bdeaf823e9d4b2c56b8.pdf?index=true
    • https://520c840f-7702-4e28-87de-278da5b03b63.filesusr.com/ugd/e633b3_91f64f63fdb74500ac61c0c616295a82.pdf?index=true
    • http://wazokikenida.rf.gd/farmall_super_c_fast_hitch_to_3_point.pdf
    • https://s3.amazonaws.com/lopadivupudexa/buwolopufejobek.pdf
    • http://zujapataluzipo.epizy.com/englisch_aufgaben_klasse_7.pdf
    • http://xiwularofevomu.epizy.com/gebadolujizugil.pdf
    • https://s3.amazonaws.com/widetunipet/blanks_usa_raffle_ticket_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010eeb.bin
06b3765a189317b2c61cc050fec3027df26c7fa14422a93b2011c2fdc8817819		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEB 5488 bytes
font_01_sfnt_off0001218c.bin
6aa0c9249d6dfd835ef2fb16969fa07c5db0a9ab63d948d9ac2cdc4f46e6befe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1218C 10852 bytes
font_02_sfnt_off000146bf.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146BF 4324 bytes

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