Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0a7302aa812e2d…

MALICIOUS

PDF

76.7 KB Created: 2021-03-12 18:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 923237c79bfa704bcdcf14afeb8179a0 SHA-1: d32d71b73f15bffe435ab1ecf2360f502daad021 SHA-256: 3f0a7302aa812e2dbe36522499ca6141a15f166e086540791926eaa27ec8d4f6
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be a lure related to academic referencing, likely intended to trick users into clicking the embedded URL which is a common phishing tactic.

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://jumiwimov.ru/award?keyword=referencia+bibliografica+de+un+pdf+apa
    • https://static.s123-cdn-static.com/uploads/4378164/normal_600826b5f229d.pdf
    • https://cdn.sqhk.co/riketumes/miiL3A4/26199944297.pdf
    • https://cdn.sqhk.co/lixejudazeza/yxa2jfC/extreme_city_gt_car_stunts_game_download.pdf
    • https://cdn.sqhk.co/jotenitix/jifW9sD/tiger_shark_attack_maui_2019.pdf
    • https://cdn-cms.f-static.net/uploads/4403130/normal_6046d50c0edcc.pdf
    • https://cdn.sqhk.co/rarinuva/fyrQDif/xerirejomunutolefibuzi.pdf
    • https://cdn.sqhk.co/bevurokakug/igjjQii/titan_quest_switch_co_op_reviews.pdf
    • https://cdn.sqhk.co/xupodafib/SjaNzia/40214405670.pdf
    • http://lusowifivixava.iblogger.org/average_salary_of_chartered_financial_analyst_in_india.pdf
    • http://tenegijo.iblogger.org/avatharam_telugu_full_movie_free.pdf
    • https://cdn-cms.f-static.net/uploads/4412573/normal_6019de61cc6c0.pdf
    • https://cdn.sqhk.co/nasanoroge/hbihijA/the_open_university_of_hong_kong_ranking.pdf
    • https://cdn.sqhk.co/sudizatase/LpLhfjb/imdb_vikings_cast_season_3.pdf
    • https://cdn-cms.f-static.net/uploads/4392652/normal_6018c11a6aed0.pdf
    • https://cdn.sqhk.co/jogeguzotire/d38jeLj/zaxivuwuzuwo.pdf
    • https://cdn.sqhk.co/lopijikuvi/fnafggm/alarm_clock_no_sound_android.pdf
    • https://cdn.sqhk.co/gutinisiv/jjaxwjf/84305863920.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gepikadagutuv.epizy.com/business_writing_skills_books.pdf
    • https://uploads.strikinglycdn.com/files/4d74931b-ad71-4bdd-8dd2-d34e0e9aa093/is_android_development_in_demand.pdf
    • https://uploads.strikinglycdn.com/files/a4458d4b-f361-4a85-a9a7-7e7c0012ff83/19146909310.pdf
    • http://vulikoviluxugu.rf.gd/27017904005.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_off0000eb2c.bin
ca37e08db040c8b7295ff299da23d1701a582d52bf742592992fce6a31614920
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2C 5292 bytes
font_01_sfnt_off0000fd3d.bin
3f2308430ef4ac84bcf4fc6a88404388d361d68fea2e839029962942adb17e80
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3D 11796 bytes