Malicious PDF — malware analysis report

Static analysis result for SHA-256 338ec4cf008d8ce3…

MALICIOUS

PDF

86.0 KB Created: 2021-03-23 10:28:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 165cde90787a186d5bcce5f5923927b3 SHA-1: 7ebd64874c0f6a8bfaaf12df1bb1cbf0d974d620 SHA-256: 338ec4cf008d8ce346a69c005bcb65f34da39d3c559791f45ac66bfc221affbc
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that lead to suspicious domains, and ClamAV detected it as a phishing trojan. The ML classifier also flagged it with high confidence. The document's content, though heavily obfuscated, appears to be a lure related to a 'memory palace technique book', likely intended to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/strik?utm_term=memory+palace+technique+book
    • https://cdn.sqhk.co/gusisezepemu/gpjanxy/how_to_make_bingo_cards_for_zoom.pdf
    • http://tumbochka.space/49927963563p7rbu.pdf
    • http://hurricane1.space/etek_5_vs_lv1pdx56.pdf
    • http://posadukik.getenjoyment.net/93191427617.pdf
    • https://cdn.sqhk.co/ravawiku/Dijtdid/zefoge.pdf
    • http://8gusevshop.space/jogorukojarudowifi6jgm8.pdf
    • http://moradudipomibo.mypressonline.com/convertir_de_a_word_editable_en_linea.pdf
    • https://nabokopawupanav.weebly.com/uploads/1/3/0/7/130739772/e43bd91.pdf
    • http://joriwolujuf.sportsontheweb.net/basic_life_support_2020_aha.pdf
    • https://cdn.sqhk.co/sesekopusoj/Kgdgjdr/rolex_daytona_racing_history.pdf
    • http://rajeziriga.scienceontheweb.net/libro_asana_pranayama_mudra_bandha_en_espaol.pdf
    • http://xufededubumavif.scienceontheweb.net/como_se_hace_un_manual_de_usuario.pdf
    • https://gemigefe.weebly.com/uploads/1/3/4/6/134602098/420432.pdf
    • http://xteenware.online/marshall_acton_manualxr8ts.pdf
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/ruripo.pdf
    • https://dejaxunex.weebly.com/uploads/1/3/4/3/134318563/duvirareredexovej.pdf
    • http://sugoxebojun.getenjoyment.net/44783873110.pdf
    • http://simopuvoramawu.mywebcommunity.org/what_do_you_get_if_you_pre_order_cyberpunk_2077.pdf
    • https://kapizufon.weebly.com/uploads/1/3/4/4/134486886/6209717.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xujitezu/osmosis_and_diffusion_free_worksheet.pdf
    • http://kuxubakelixuzot.atwebpages.com/79593628133.pdf
    • https://s3.amazonaws.com/wufujudisu/james_patterson_alex_cross_books_2019.pdf
    • https://s3.amazonaws.com/lolijexejomak/practice_word_problems_inequalities_answer_key.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_off00011235.bin
84848662bc20cc59366125a461187cf8da9eba3db474587b619b646a55bb9e23
pdf-font-stream PDF embedded font (sfnt) at offset 0x11235 5432 bytes
font_01_sfnt_off00012492.bin
71b3205c9d2de8b59f151028b263b6ea351890a1125d8212b32aa3ffc795d5c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12492 11468 bytes