Malicious PDF — malware analysis report

Static analysis result for SHA-256 43541f10b81dadab…

MALICIOUS

PDF

78.6 KB Created: 2021-03-25 10:12:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 292f0f593bb4bcbb32d21253103fbecf SHA-1: 51dae4c05a9f74e8f4c1b9cbfaeec30b56e227a4 SHA-256: 43541f10b81dadab0a9c12a06d9b9a98f22f9e34e3d9ce28f5d3c7d469659ec1
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a search result for a golf driver, suggesting a lure to disguise its malicious intent. While no scripts were directly extracted, the nature of the detection and the presence of many external links indicate a likely attempt to download and execute a secondary payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=taylormade+burner+driver+white
    • http://pexawegowe.mywebcommunity.org/law_of_cosines_word_problems_worksheet_with_answers.pdf
    • http://qupieasy.online/how_to_reset_a_bunker_hill_digital_floor_safefj87s.pdf
    • http://larokamexi.sportsontheweb.net/zizukugav.pdf
    • http://nominasacra.ru/gojuffp1jk.pdf
    • http://robugipunebib.mygamesonline.org/how_to_list_multiple_possessive_nouns.pdf
    • http://copyrighthelpcentral.com/zuwodegulepamekawukawyftz3.pdf
    • http://gekifek.scienceontheweb.net/1572395346.pdf
    • http://tradebot.space/phonotactic_constraints_in_englishiw7tv.pdf
    • http://romeoplanet.club/karafugokataxozimebibo9jwpn.pdf
    • http://guitar.su/arris_tm722_speed4lqy8.pdf
    • http://icub.tech/how_much_does_a_scientists_make3u72f.pdf
    • http://fsbsiod.com/famosos_en_la_guerra_civil_espaolaeefap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kepofif.onlinewebshop.net/are_lock_picking_tools_legal_in_california.pdf
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_c23960eabf0747ada5f378e5c719ab86.pdf?index=true
    • https://90138cf2-752b-46b9-a396-1872e0473e42.filesusr.com/ugd/02203e_a34afc3ef5c84e84a9ecbf32d5ef4a78.pdf?index=true
    • https://b2691e05-be35-46d2-a26d-08c503de0475.filesusr.com/ugd/b15c0b_fd71b231f2e047ca8a00e732d3967273.pdf?index=true
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_b58c2b38437046d58854ca9c58524027.pdf?index=true
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_54124f28c5a1436b8a146045299e3914.pdf?index=true
    • http://lafagelupuf.myartsonline.com/livros_urbanismo.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_off0000f3e2.bin
3aa512a20429a9d2d5972a9c7f873ebde32264fec895d6fe2d08b1aa3b87ae32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E2 5232 bytes
font_01_sfnt_off00010598.bin
3235e65fc4e72bdedaed369cb82f037593fa8ba974af619f17d7a56d68af3432		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10598 11620 bytes

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