Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03b242d230c82b0…

MALICIOUS

PDF

74.9 KB Created: 2021-04-08 03:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 005f6d9ed5bb2367830540b0794e2ad8 SHA-1: d185abd82ec20b788009e0992b6bea0ac4225e09 SHA-256: b03b242d230c82b0ccc66af4f416f247cf193caf5bea6c8897d520b170ab7b21
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a domain that is likely used for phishing or distributing further malicious content. The document body, though heavily obfuscated, suggests a lure related to educational materials, which is a common tactic for phishing.

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://dafemum.ru/wix?keyword=photosynthesis+and+cellular+respiration+review+sheet+answers
    • https://cdn.sqhk.co/xelajuwodaf/ibVjfge/perfect_shift_game_hack.pdf
    • http://zitokujamu.mypressonline.com/the_authorized_king_james_version_of_1611.pdf
    • http://xipodijajul.sportsontheweb.net/examples_of_non_verbal_communication.pdf
    • http://konalofasu.mywebcommunity.org/physical_development_activities_for_18-24_months.pdf
    • https://medowiwufaj.weebly.com/uploads/1/3/4/4/134480571/bonudisopamefibofedo.pdf
    • https://jebovemedafo.weebly.com/uploads/1/3/0/8/130813903/7024739.pdf
    • https://sifurimunudop.weebly.com/uploads/1/3/4/3/134328932/fuvanoso.pdf
    • https://cdn.sqhk.co/desixurate/ChjjaOH/daniel_tiger_s_parents_names.pdf
    • http://dikagowoxi.sportsontheweb.net/les_4_accords_toltques_gratuit.pdf
    • http://matawobedopikam.mywebcommunity.org/alfabeto_coreano_espaol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tarizirefevifab/acha_chalta_hu_lyrics.pdf
    • http://pelebirepopo.onlinewebshop.net/matibabodinakanemovej.pdf
    • https://s3.amazonaws.com/sedowedi/caller_id_location_tracker.pdf
    • http://juwukopegonamu.onlinewebshop.net/autodwg_to_dwg_converter_pro_2020_v3._9._1.pdf
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_735526197a244beb9fa89a202df85f89.pdf?index=true
    • https://s3.amazonaws.com/gapuruxumeg/tavugivivigosutiji.pdf
    • http://likutolejit.onlinewebshop.net/tascam_dp-004_for_sale.pdf
    • https://s3.amazonaws.com/gavobawum/canada_post_change_of_address_notification_forms.pdf
    • https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_08dd1cdcee7f4b0d9988fc312cb97138.pdf?index=true
    • https://s3.amazonaws.com/zumezeviwakiz/assembly_language_programming_8085_tutorial.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_off0000e49c.bin
a15ee454f20ef12972f54038d298c2e9c6d65e43bac24d3bcd4eb406cb1cd289
pdf-font-stream PDF embedded font (sfnt) at offset 0xE49C 5416 bytes
font_01_sfnt_off0000f71e.bin
0308595f73b2dc2a5b00f10925cdff220219494dfe65b6432504ae81a46b24a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF71E 11900 bytes