Malicious PDF — malware analysis report

Static analysis result for SHA-256 be930fbf2d29cc46…

MALICIOUS

PDF

92.9 KB Created: 2021-03-17 17:24:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 89a7685047d16a757d9331c4dfd54e54 SHA-1: dfa882afb9299b17512af1ab45fd238b15ee9c53 SHA-256: be930fbf2d29cc460e868822ffce09768f049d4230f38fdeb2c14ec5ce02e02c
186 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable hosting services, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO abuse. No scripts were extracted, but the embedded links are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/award?keyword=capacity+conversion+worksheet+pdf PDF link annotation
    • http://autolombardpro.ru/55822929568p1o32.pdfIn PDF document text
    • https://cdn.sqhk.co/tamenotu/oXO6qAy/battle_realms_1_free_full_game.pdfIn PDF document text
    • https://cdn.sqhk.co/rebawigabog/Uje4qu6/prospect_umc_covington_ga.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/much_ado_about_nothing_character_analysis_claudio.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/i7cb4hj/neo_geo_mvs_console_cbox.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/jigf7la/felixibiruruk.pdfIn PDF document text
    • https://cdn.sqhk.co/tamenotu/4H7tYij/vubowupakokesane.pdfIn PDF document text
    • http://mupifojoxur.medianewsonline.com/atkins_plan.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/hp_officejet_7510_remove_printhead.pdfIn PDF document text
    • https://cdn.sqhk.co/fusevesapime/XhQjbii/voteditekadofepenijogeme.pdfIn PDF document text
    • http://nugawijuxuv.mywebcommunity.org/tylenol_davis_drug_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/nobipajami/htFibAw/islamic_daycare_in_philadelphia.pdfIn PDF document text
    • http://nesobaka3.xyz/songs_that_will_bring_back_memoriesjoxh7.pdfIn PDF document text
    • http://trokot-new.online/19536161767esilh.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/oFid9ja/colt_express_how_to_play.pdfIn PDF document text
    • https://cdn.sqhk.co/firokizita/jHfaVjb/66174037082.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
    • https://uploads.strikinglycdn.com/files/f02c3400-1163-41c0-8bcb-59b997b7d3c3/keller_williams_ignite_session_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f730634-363a-4917-8666-0f5787b27100/what_is_the_law_of_summary_judgment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b2ec2d-484f-420b-9c2d-d2219e2679b3/how_to_change_tiles_in_scrabble_go.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f46503-8e48-4a31-8bf6-afa83c9fe864/jbl_flip_3_repair_manual.pdfIn PDF document text
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_90fe54d1f80e40b5952b832b142e3006.pdf?index=trueIn PDF document text
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_a3ee4e819abb48dd97184839cbcab505.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10825 5340 bytes
SHA-256: 8248a194cd49035c82bb62d2b079b0cad8d8b207ecd852e531cc803311b69c04
font_01_sfnt_off00011a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5F 11860 bytes
SHA-256: f0350c1efa64b9a9b0a977e35579211d66b871eacbc76b90a5560b4e009daaf1
font_02_sfnt_off00014310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14310 16036 bytes
SHA-256: 9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940
font_03_sfnt_off00015779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15779 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333