Malicious PDF — malware analysis report

Static analysis result for SHA-256 a768a578b3ad4af0…

MALICIOUS

PDF

78.1 KB Created: 2021-04-03 05:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd72f85568468383b2bc9f3fd665cf28 SHA-1: 48dd5bd1f9a19e1306534b94a4d4bdabd3678e33 SHA-256: a768a578b3ad4af0ba51c06e55591d6f5e844ec856df2ca395a64a80b14784b0
96 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload. The document body, though heavily obfuscated, suggests a lure related to psychological history to encourage user interaction with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/award?keyword=historia+clinica+psicologica+adultos+pdf
    • http://tofotibuwul.sportsontheweb.net/why_is_my_ryobi_charger_blinking_red.pdf
    • https://cdn.sqhk.co/tuvameboroke/ghp6igj/momuxuvasovokexev.pdf
    • https://cdn-cms.f-static.net/uploads/4468267/normal_602ff12b68596.pdf
    • https://cdn.sqhk.co/sewuvavimebi/eIJjaii/3_mystery_words_level_10.pdf
    • http://juponuziwotaga.mywebcommunity.org/rewufaxizesuxawopukepe.pdf
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5fd7b74712953.pdf
    • https://cdn.sqhk.co/livatunozasu/khdFrjb/minecraft_earth_release_date_day.pdf
    • https://cdn-cms.f-static.net/uploads/4487424/normal_5fdb1e97786c8.pdf
    • https://cdn.sqhk.co/gojinuma/hhhjcHZ/neon_wallpaper_iphone_6s_plus.pdf
    • https://cdn-cms.f-static.net/uploads/4500679/normal_604d1f60235fd.pdf
    • https://cdn.sqhk.co/guzamuvi/vijbgds/79748472844.pdf
    • http://xifadezuzurap.medianewsonline.com/calendrier_coupe_monde_rugby_2020.pdf
    • https://cdn.sqhk.co/nokikifabaf/S0AgixJ/shortcut_run_command_in_ubuntu.pdf
    • https://cdn.sqhk.co/wexifidobafo/jbIibDH/depuvakelajuvelib.pdf
    • https://cdn-cms.f-static.net/uploads/4414175/normal_605b53a2b3704.pdf
    • https://cdn.sqhk.co/dakagugi/jidkf6J/zombie_apocalypse_unblocked_games_6969.pdf
    • https://cdn-cms.f-static.net/uploads/4486221/normal_6053b9cdefce9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kumasala/rasab.pdf
    • https://s3.amazonaws.com/lonozote/charles_aznavour_formidable_lyrics.pdf
    • http://gonegexunu.myartsonline.com/srm_210_echo_trimmer_owners_manual.pdf
    • https://s3.amazonaws.com/tawosutosuxi/what_is_the_spy_museum_in_dc.pdf
    • https://s3.amazonaws.com/sojebelevenex/79747383904.pdf
    • http://zakexukosogu.atwebpages.com/75666357697.pdf
    • https://s3.amazonaws.com/gomaxod/38916153531.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_off0000f258.bin
5bec6820ec88f36290fb50d10507b02a85fde632b9b37115b7a0bc54a2233c5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF258 5284 bytes
font_01_sfnt_off0001045c.bin
e338b0d0a73e7e74b1d0d690809afbd27fda04679e3267328899a8d2612e8e6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1045C 11432 bytes

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