Malicious PDF — malware analysis report

Static analysis result for SHA-256 c86552a5cc1de3a9…

MALICIOUS

PDF

72.0 KB Created: 2021-02-03 06:50:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f851e0b12b54d5c0ef464ef38b8d37e2 SHA-1: 7f54713f8ae595f492cf0d3319c7cd6fda4d8738 SHA-256: c86552a5cc1de3a9259e292836eb8f86e4a56a8c249c1781941ae757ab9ff302
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The embedded content, though heavily obfuscated, suggests a lure related to a 'Sony bravia tv 55 inch user manual'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via the malicious URL.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=sony+bravia+tv+55+inch+user+manual In PDF document text
    • http://resimpub.com/jellyfish_live_wallpaper_hdfe2t1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471691/normal_5febbecd5ce79.pdfIn PDF document text
    • http://lojotiwutorolad.22web.org/worksheets_for_integers_class_6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386613/normal_5fcc077c3fa94.pdfIn PDF document text
    • http://gojepifega.22web.org/genetics_practice_problems_pedigree_tables_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/erYgiRc/monkey_boxing_apk_mod_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mikitikotak/jg5rgh2/bluetooth_speaker_system_for_motorcycle.pdfIn PDF document text
    • http://xasujaru.22web.org/sound_recorder_app_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5fd68a79a3063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471273/normal_60102991ad273.pdfIn PDF document text
    • http://beamorem.com/idle_goddess-_best_idle_rpgz3rz7.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/sosimivakefepawi6kgfm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gorefoverotiw.epizy.com/96698718668.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/parrot_bebop_2_drone_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/hd_movies_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/purpose_statement_for_graduate_school_format.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/flappy_bird_sound_effects_free.pdfIn PDF document text
    • http://pavasokunise.epizy.com/akon_freedom_album_free.pdfIn PDF document text
    • http://kirigawegugava.epizy.com/mekepeduzofimilubarakap.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/56853828041.pdfIn PDF document text
    • http://xogeguf.rf.gd/additional_mathematics_for_west_africa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CF 5568 bytes
SHA-256: 4a77cf5ec435f8d3724182ccde5caf938cfc795fc7cc907c5d6f14524b13cd63
font_01_sfnt_off0000eaa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA8 13200 bytes
SHA-256: bb978922946329d112a0ea2b8ab45677df7e0cee8bbcfacf200ad95bce58d49d

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