Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d8003f3b49de8f…

MALICIOUS

PDF

73.5 KB Created: 2021-03-13 14:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f14d208c0bd893cae49b997c25e41ee1 SHA-1: d46f363e912537d15a03c883026440e7d3f3e4c8 SHA-256: 81d8003f3b49de8fe0f56c7b61ac11f51cd95435ce64ed421e35eaa6cddd47b8
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though partially obfuscated, contains text related to changing a Sony headphone battery, which serves as a lure. The primary malicious indicator is the embedded URL pointing to 'jumiwimov.ru', likely a phishing or malware distribution site, which is consistent with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/strik?utm_term=how+to+change+battery+in+sony+mdr-rf985rk
    • http://govnosiakxws.online/8931020401vn2xu.pdf
    • https://cdn.sqhk.co/xumesapaxoku/88jhEA6/16579374108.pdf
    • http://jetolad.iblogger.org/danielle_steel_books_2020.pdf
    • http://gibejujefuguxax.22web.org/paxoxokimujus.pdf
    • https://cdn.sqhk.co/regavebike/chficig/xejasunimazovoridesatebeg.pdf
    • https://cdn.sqhk.co/susojareb/jg8idib/hero_or_villain_battle_royale.pdf
    • http://reduslimitalia.site/black_christmas_movie_2019_free_onlinekb4e5.pdf
    • https://cdn.sqhk.co/xevowuto/djiihy2/defeduxamukenurozitu.pdf
    • http://just-gopro.com/is_blast_protection_better_than_projectile_protectionen40m.pdf
    • https://cdn.sqhk.co/matelasoguje/mihiybk/game_of_sultans_facebook_hesap_degistirme.pdf
    • https://cdn.sqhk.co/napumefu/fzPBLjj/3392745029.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vukefuxi.epizy.com/free_coming_soon_landing_page_template.pdf
    • http://todizegi.epizy.com/auditoria_interna_x_auditoria_externa.pdf
    • http://xaposekesudonod.epizy.com/free_open_world_survival_games_on_steam.pdf
    • https://uploads.strikinglycdn.com/files/a851727e-89e6-49bf-aee3-bd4af83823d9/android_studio_bookmark_mnemonic.pdf
    • http://sadizoju.epizy.com/50072869687.pdf
    • http://vegodaravowes.rf.gd/zolededalamajawekunexev.pdf
    • http://fuginifetulad.epizy.com/12280741978.pdf
    • https://uploads.strikinglycdn.com/files/6d173dc8-17ca-4338-8de2-3d1db77b66a4/citizen_ladies_two-tone_eco-drive_bracelet_watch.pdf
    • http://biwodonugawodil.rf.gd/22061527149.pdf
    • http://repajazofuwide.epizy.com/because_i_got_high_chipmunks.pdf
    • https://uploads.strikinglycdn.com/files/7fb4d8e7-359e-4a16-9f28-cd7bded09ae4/what_is_the_role_of_a_site_warden.pdf
    • https://uploads.strikinglycdn.com/files/3d6712a8-644b-4a69-b1e0-4723d8848840/which_is_not_a_part_of_the_suns_atmosphere.pdf
    • https://uploads.strikinglycdn.com/files/7a6d5fd4-8f5c-438e-933c-16118017a940/betokokufe.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.

FilenameKindSourceSize
font_00_sfnt_off0000dc6c.bin
ac989fe3ab1c1b8056a87b67523f373470adade890299a6bbdc0018356ec693f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6C 6268 bytes
font_01_sfnt_off0000f1b3.bin
6d5e882d6a3708af4ee0cf1ab9f60ebed9db7b84963d5bddbc63b37973263af0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 10796 bytes

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