Malicious PDF — malware analysis report

Static analysis result for SHA-256 460cd476f79a75ad…

MALICIOUS

PDF

84.9 KB Created: 2021-03-14 16:54:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 05a02168783f31e48c2a6c93707e8aa2 SHA-1: f9002b83512fa3a971371b353438eb986f307be8 SHA-256: 460cd476f79a75adc3dccc8ad4a98cd0dee93c60ced71cfe421cdfd9feaaae6e
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ClamAV signature and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware or phish users. The document body, though heavily corrupted, contains text related to 'Beethoven fur elise notes pdf', indicating a lure to attract users searching for musical information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/award?keyword=beethoven+fur+elise+notes+pdf PDF link annotation
    • https://vodazifuja.weebly.com/uploads/1/3/4/2/134265633/7361447.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/human_resource_management_calicut_university.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/pjdljh5/vogejepaw.pdfIn PDF document text
    • https://cdn.sqhk.co/begazopego/Phcgjjj/renaissance_age_in_english_literature.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471719/normal_60402dafa50c2.pdfIn PDF document text
    • http://rijoginijamibeg.mypressonline.com/10968986557.pdfIn PDF document text
    • http://instasurprise.online/25331940772ljczb.pdfIn PDF document text
    • http://crispyset.online/form_of_r_b_music0npsu.pdfIn PDF document text
    • https://cdn.sqhk.co/zegareguw/RgevJyW/tiktok_songs_playlist_2020_not_clean.pdfIn PDF document text
    • https://cdn.sqhk.co/jadizefon/jjhaQhf/1923282891.pdfIn PDF document text
    • http://bridgecommerce.com/bissell_spotclean_professional_portable_carpet_cleaner_3624i8lww.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414494/normal_602c61612e8a2.pdfIn PDF document text
    • http://beamorem.com/teaching_feeling_1.9_mod_apkghnjp.pdfIn PDF document text
    • https://cdn.sqhk.co/xetokive/IIhgPOk/50006004004.pdfIn PDF document text
    • https://cdn.sqhk.co/mozedizupi/hajcJyV/42808625735.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/gE0sieI/51883890046.pdfIn PDF document text
    • http://vuxilenusip.mypressonline.com/10814374332.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/Zwmfsjh/swing_shift_schedule_maker.pdfIn PDF document text
    • https://daxodewime.weebly.com/uploads/1/3/1/3/131398188/ad28dbacb.pdfIn PDF document text
    • https://cdn.sqhk.co/bibobovezave/zogjWgc/81391623905.pdfIn PDF document text
    • https://kabulemumolitu.weebly.com/uploads/1/3/4/8/134869515/ae54ea831572.pdfIn PDF document text
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/604672.pdfIn PDF document text
    • https://zeruwowigewal.weebly.com/uploads/1/3/0/8/130813736/0a4ffbb4e5c0f.pdfIn PDF document text
    • http://zolepop.mypressonline.com/introduction_to_linguistics_columbia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_5fd87933ad75f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61C 5028 bytes
SHA-256: 0ea8f3d747aefaf85e929fe1cec52ccc881b36895b5c4ba485adadf1af3e587a
font_01_sfnt_off0001073f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073F 12256 bytes
SHA-256: 306cd23f302368d2051efd88cd6610815b0d009e8f3ec7faacbe58634ad4952f
font_02_sfnt_off00012f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F60 16120 bytes
SHA-256: 2cfc97915d250804213c9b0e6ad261e0979cd38371fb36ec9174dea58a153a3e