Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbd8718b5c97100…

MALICIOUS

PDF

74.4 KB Created: 2021-03-27 16:37:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 343bc65f8f911f85b447072372bef57f SHA-1: e3f1389b58e35c94e4b7bd59849784aa17b71b73 SHA-256: 8fbd8718b5c9710068a0ef29e04cb76c38b23ba747ef016a235fe035e267502b
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to 'Vm audio reviews' and 'wkhtmltopdf', suggesting a lure to a fake review or download page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/wix?keyword=vm+audio+reviews
    • http://dobuwiwitevotir.sportsontheweb.net/physics_today_book.pdf
    • http://klokisik.space/pebezebitomezj4ilz.pdf
    • http://soldonlittleton.com/swann_extra_security_camera_4k_ultra_hdrlajc.pdf
    • http://wadipogi.medianewsonline.com/5th_grade_math_staar_practice_worksheets.pdf
    • http://igbusinessabouthelp.com/pijadido0d9lj.pdf
    • http://xejapuz.getenjoyment.net/lojijabokipe.pdf
    • http://fibiver.mygamesonline.org/35042619291.pdf
    • http://rubyshup.space/vesibunibolalisavupzcqv.pdf
    • http://fastpeysistem.online/the_dead_sea_scrolls_deception5ohlt.pdf
    • https://cdn.sqhk.co/gupuwiwi/DgiagdF/download_summer_sports_events_mod_apk_android_1.pdf
    • https://cdn.sqhk.co/bemovunilupo/hg1tv2Y/50903979206.pdf
    • http://copyrightnotice-ig.com/tezimojufodusyb3ir.pdf
    • http://helpverifedbadges.com/papapegurusaxapewodaztl1fp.pdf
    • http://vermono.site/30409860835f3nx2.pdf
    • http://vvinorama.fun/im_supposed_to_or_im_suppose_toeyr9q.pdf
    • http://ejqy.com/how_rich_are_the_top_1_percent_ukau5gj.pdf
    • http://unonatur.space/grade_2_math_workbooksua5lo.pdf
    • https://cdn.sqhk.co/zimopiroxab/jdNjajb/food_menu_template_freepik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bodegifu.atwebpages.com/mcdonalds_marketing_mix_physical_evidence.pdf
    • https://uploads.strikinglycdn.com/files/eb970fa0-a906-425d-8d88-547ce67fb677/hp_1320_printer_driver_for_windows_7_32_bit_download.pdf
    • https://uploads.strikinglycdn.com/files/5596e5e0-7e32-4369-b7db-b298098c4cac/1984_discussion_questions_chapter_1.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_off0000e66a.bin
fb19cdfbce73460d83c30c1062a66f6c552013ff13788ccacb8de8700091b939
pdf-font-stream PDF embedded font (sfnt) at offset 0xE66A 5056 bytes
font_01_sfnt_off0000f797.bin
39093d0d7dda49ccf4d8debed90aa41e9ad3694cfb01766427f2e74226933972
pdf-font-stream PDF embedded font (sfnt) at offset 0xF797 10908 bytes