Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5a7a3de26fa610…

MALICIOUS

PDF

75.3 KB Created: 2021-03-01 07:56:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e1c4ef7eda5354f0778dc65428cdee2b SHA-1: 11162164601bf1a91acea87fe1658a6458769bb0 SHA-256: 1b5a7a3de26fa610bd3388f45f1bee666f8aa1108e859cd2d3ea502849153609
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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 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://zajinet.ru/wix?keyword=sao+ep+19+bg+sub PDF link annotation
    • https://cdn.sqhk.co/xunijejozi/ALnejbt/rojemodepig.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/jugurunizekomikelomexuj.pdfIn PDF document text
    • http://kismykeitio.best/2971130335rte6g.pdfIn PDF document text
    • http://cyberlife.store/draw_in_spanish_means3ylpk.pdfIn PDF document text
    • http://hurricane1.space/saeco_talea_giro_plus_service_manual59ipz.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/journey_to_the_center_of_the_earth_2008_full_movie_in_hindi_dubbed_download_mp4moviez.pdfIn PDF document text
    • http://powerhdniy.space/nakofatonuyun2l.pdfIn PDF document text
    • http://axacheat4.xyz/84722260764e26o9.pdfIn PDF document text
    • https://cdn.sqhk.co/gegojagakexu/iiRBpGv/business_analysis_tools_and_techniques.pdfIn PDF document text
    • http://uscreditcheck.info/xiwelaxaeefdl.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/the_book_of_azazel_grimoire_of_the_damned_e._a._koetting.pdfIn PDF document text
    • http://cartest.pro/1697052348r0rl1.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/aoac_method_2018.11ytyqm.pdfIn PDF document text
    • http://vknart.xyz/92204233927erkj4.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/ygec6hg/live_video_of_earthquake_in_california.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/can_you_install_autocad_on_mac.pdfIn PDF document text
    • http://vevovifox.scienceontheweb.net/troy_bilt_edger_attachment_manual.pdfIn PDF document text
    • http://idealica-uficiale.website/ledebao2dce.pdfIn PDF document text
    • http://canonsburglake.org/16440733653uvxkc.pdfIn PDF document text
    • http://piwofoterif.sportsontheweb.net/hp_printer_officejet_pro_8600_ink.pdfIn PDF document text
    • http://juilopkiretlo.ru/b_format_paperback_marginsbo6mw.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/ciaGLFF/wedding_cake_topper_personalized_groom_and_bride.pdfIn PDF document text
    • http://verenica.net/online_grammar_quiz_middle_schoolpfcu9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://piwolimosopobu.myartsonline.com/67228010806.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD467 4956 bytes
SHA-256: 7d017508e3f3581cb8c89be2a20e38d6f527a78dba41a2f2ed24f4acf4d72259
font_01_sfnt_off0000e541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE541 14288 bytes
SHA-256: b96366a6173cd1aa90dfac4785f34c5c10c891508b2e0fca494fadcad4989ec2
font_02_sfnt_off000111e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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