Malicious PDF — malware analysis report

Static analysis result for SHA-256 de688d279b8926b5…

MALICIOUS

PDF

89.2 KB Created: 2021-03-17 10:12:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aee564680a5effa9988c1919bc9836c SHA-1: 512284b3902996bf6d8a6b2208f35c05b9f866a7 SHA-256: de688d279b8926b570ef07b05cfdbbcb7bb7c3e3491306535c621a916c6f6749
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with the primary one being 'https://xezojetit.ru/award?keyword=chapter+13+capital+budgeting+techniques+problems+and+solutions+pdf'. ClamAV detection and ML classification strongly indicate maliciousness, likely a phishing attempt disguised as financial or technical documentation. No scripts were extracted, but the presence of numerous external links suggests a downloader or redirection mechanism.

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://xezojetit.ru/award?keyword=chapter+13+capital+budgeting+techniques+problems+and+solutions+pdf
    • http://takipibimaxubov.sportsontheweb.net/how_to_use_spirit_items_smash_bros.pdf
    • http://jepenufi.getenjoyment.net/flysky_fs-i6_6ch_manual.pdf
    • https://cdn.sqhk.co/sevijeruba/jf8ibja/fanasubokat.pdf
    • https://cdn.sqhk.co/paxepilekot/i1Hptji/yeezy_boost_350_v2_carbon_reflective.pdf
    • https://cdn.sqhk.co/bilanogakiw/ifjfje7/10660823360.pdf
    • http://zarabatyivat.ru/multiplication_of_fraction_word_problems_worksheetsoatok.pdf
    • http://jolixasij.sportsontheweb.net/pioneer_avic-5100nex_backup_camera.pdf
    • http://xaraxag.mypressonline.com/boxujavuzunesopo.pdf
    • https://cdn.sqhk.co/felolavap/SQuihid/texas_longhorns_basketball_season_tickets.pdf
    • http://wifunagidoli.mypressonline.com/what_does_projection_mean_in_psychology.pdf
    • https://cdn.sqhk.co/pimibopugugo/chfuijc/lanonuwenovoxareferagam.pdf
    • https://cdn.sqhk.co/nepajenine/pPWCVjj/23198483799.pdf
    • https://cdn.sqhk.co/fakineduxafe/heieQha/8304947628.pdf
    • http://ramuwesitavoz.mywebcommunity.org/can_a_non_lawyer_represent_you_in_court_in_south_africa.pdf
    • http://organic-ita.space/35721212138uag91.pdf
    • http://zumufufup.sportsontheweb.net/wajozufafedoli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/votawawo/99903130916.pdf
    • https://s3.amazonaws.com/fewifuwu/abbey_falls_information_in_kannada_language.pdf
    • https://s3.amazonaws.com/wenobagupexekap/63769330421.pdf
    • https://s3.amazonaws.com/bugutaj/37652005018.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_off00011a3b.bin
e67bb573924afcd0b88e82da7161309126fe82bc3bac8487678b5002885b9e0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3B 5956 bytes
font_01_sfnt_off00012e4a.bin
942d04d72dbfa181cd530ab9165d05f2e78661ae8534b9ec182223fb70c490b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4A 12248 bytes