Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75e2852d7b357ae…

MALICIOUS

PDF

70.2 KB Created: 2021-03-15 23:56:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45ca50be06450df64153203d4746a013 SHA-1: d516ea39c489d19156829869bbab5196ec161920 SHA-256: f75e2852d7b357ae492808b4ae280f37a42762ae4c532b8c66b6ef6f6692809a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, likely intended to phish for user credentials or deliver a secondary payload. The document body, though heavily obfuscated, appears to be a lure related to school reviews, aligning with the embedded URL's keyword. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/wix?keyword=north+queens+community+high+school+reviews
    • https://cdn.sqhk.co/famogidoje/aiehhbs/21026907926.pdf
    • https://cdn-cms.f-static.net/uploads/4486190/normal_60370b5259ed0.pdf
    • http://nurokojo.mypressonline.com/jufuf.pdf
    • https://cdn.sqhk.co/wazafepel/Jtthdep/93175782250.pdf
    • https://cdn-cms.f-static.net/uploads/4444115/normal_6024ccfe9343a.pdf
    • https://cdn.sqhk.co/kerodamajop/2Zjhcjd/anuraga_devata_neeve_song.pdf
    • https://cdn.sqhk.co/tuxonewebuke/hL2cFUc/libatenevilokonisi.pdf
    • http://gakukuketisalum.scienceontheweb.net/9th_class_chemistry_notes_karachi_board.pdf
    • https://cdn-cms.f-static.net/uploads/4427501/normal_6032b4094d951.pdf
    • http://zogenapufunog.iblogger.org/what_is_an_indicator_species_apes.pdf
    • https://cdn.sqhk.co/vopokemib/jWwJVBM/76089813677.pdf
    • https://cdn.sqhk.co/soziwariru/jcJjfnZ/head_ball_soccer_games.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tosurok.myartsonline.com/bagpipe_music_book.pdf
    • http://pijosufun.myartsonline.com/kabuma.pdf
    • http://dunogulazemetus.epizy.com/green_marketing_articles.pdf
    • http://rizukapusapanom.rf.gd/gap_analysis_report_template.pdf
    • http://vekemelegewimo.atwebpages.com/how_do_you_find_exterior_angles_of_a_polygon.pdf
    • http://verirajoxa.epizy.com/kenmore_vacuum_116_parts.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_off0000d5a7.bin
78452b21b4166460027955bd2b5207bc369a65dd4b864dc059c2456475e10853		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A7 5352 bytes
font_01_sfnt_off0000e7da.bin
62ddcfee9d804a23fd2b70e9a52ff4536c17d1630979fef637accfc336c228c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DA 10412 bytes

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