Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04523ae4ad64d4b…

MALICIOUS

PDF

78.1 KB Created: 2021-04-05 06:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42249be7b21bafcd9c648e69722f98aa SHA-1: 5c9dc0a1384f54c1188329eaa5a0668834ecf2d2 SHA-256: b04523ae4ad64d4bc9380a9659cae1e981baa9f174ded3ad3dad2b74721c4029
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a malicious site. The document body is heavily obfuscated, but the presence of the external URI suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/123?utm_term=toram+online+halberd+skill+guide
    • https://cdn-cms.f-static.net/uploads/4403531/normal_60664019eb904.pdf
    • http://docita.fun/377762296714zhce.pdf
    • http://medtechnika1.ru/30652495953zyir4.pdf
    • http://eduha.online/93214754273b7vew.pdf
    • https://cdn.sqhk.co/netimawifes/ij7Xche/minerals_hotel_spa_at_crystal_springs.pdf
    • https://cdn-cms.f-static.net/uploads/4453329/normal_606217a090440.pdf
    • http://llloooodddd.space/bluebook_statute_short_formenm2i.pdf
    • http://creditstar-kabinet.com/push_pull_mosfet_driverl9exz.pdf
    • https://static.s123-cdn-static.com/uploads/4500450/normal_5fe40b70715df.pdf
    • http://braco.ru/fuwageninemodijax8dsw5.pdf
    • https://cdn.sqhk.co/tutabalero/elyhahg/bupedipewef.pdf
    • https://cdn.sqhk.co/wipedekis/fqjfjhO/wordful-_word_search_mind_games.pdf
    • https://cdn.sqhk.co/vafexifere/wKRENia/gavuzarobowibizirepesi.pdf
    • https://cdn.sqhk.co/gaxozamikoge/aJGggjg/duty_wars_ww2.pdf
    • https://cdn.sqhk.co/bobimugura/hgDuLL0/farm_animal_colouring_pages_print.pdf
    • https://cdn.sqhk.co/napumefu/qjfgjdq/merriam_webster_learner_s_dictionary_premium_apk.pdf
    • http://verefdliyvtorogo.xyz/types_of_electrical_actuators5iub3.pdf
    • https://cdn.sqhk.co/viwitukaz/Ihhsdie/que_son_los_cantares_de_gesta.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lawakux/financial_reporting_actuarial_outpost.pdf
    • https://s3.amazonaws.com/xufujofaleki/gudukisijarotaxiw.pdf
    • https://s3.amazonaws.com/boxujetanonikuv/septic_arthritis_adalah.pdf
    • https://s3.amazonaws.com/bizamesuwepe/new_robbery_movies_free.pdf
    • https://s3.amazonaws.com/vixuwogetiv/free_html_responsive_templates_for_education.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_off0000f1af.bin
0dc5d9cc6d49c1e6115cb4a92f51480df1943449fb0808c9a4887931ce611151
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AF 5392 bytes
font_01_sfnt_off000103cc.bin
23380c6034b978180280ea084d632b14aa7fedc524cc1ee8619d27018e772ef6
pdf-font-stream PDF embedded font (sfnt) at offset 0x103CC 11744 bytes