Malicious PDF — malware analysis report

Static analysis result for SHA-256 546033e4d6c9f220…

MALICIOUS

PDF

79.1 KB Created: 2021-04-03 17:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c95ef1f6fdfacac8bc6a733cea505483 SHA-1: 347718f2b984f391fc2d2a8bff54286b7d3a619d SHA-256: 546033e4d6c9f220e650fcbd12454d96118cfb81123dbfa3b7088e4a227a3d15
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of SEO spam or phishing by linking to numerous external websites, disguised as an 'Exchange rate worksheet economics'. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest the document is designed to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/wix?keyword=exchange+rate+worksheet+economics PDF link annotation
    • https://cdn.sqhk.co/gisanewat/OGjaHji/60263471967.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/970d85d3c.pdfIn PDF document text
    • https://cdn.sqhk.co/dodagirojep/jdjjUeb/the_last_vikings_mod_apk_android_1.pdfIn PDF document text
    • http://medilawibume.scienceontheweb.net/77212978237.pdfIn PDF document text
    • https://cdn.sqhk.co/febutatesu/vSihg2c/65915890408.pdfIn PDF document text
    • https://setijuxuzazoba.weebly.com/uploads/1/3/4/5/134500005/fipos_raxinom_renatikimamuwo.pdfIn PDF document text
    • http://gazedalepi.sportsontheweb.net/72321148118.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/4ihgje8/solitaire_games_with_cards.pdfIn PDF document text
    • http://divebelas.iblogger.org/aptis_sample_exam.pdfIn PDF document text
    • http://organic100.fun/wizutizonufupixo1ge.pdfIn PDF document text
    • http://duvesawolaxu.22web.org/blockchain_tutorial_point_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/HEjjbjc/wubadopow.pdfIn PDF document text
    • https://togajakuro.weebly.com/uploads/1/3/1/4/131409127/kepadi.pdfIn PDF document text
    • https://zawoxabupuw.weebly.com/uploads/1/3/5/9/135990747/4423813.pdfIn PDF document text
    • http://tuvosudokalidu.scienceontheweb.net/2971023487.pdfIn PDF document text
    • http://m-laskin.ru/puwesawimumetikezepikwv3g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d442ae-508f-4712-850b-fbb5d21bfff5/wapas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8968cac-eaa7-4a17-9c9e-9cb90a3f96d9/82549926035.pdfIn PDF document text
    • http://jugebifa.epizy.com/81799133582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a0839cb-2365-4866-8d13-32efdd6b7901/falebovebolefoxagajitif.pdfIn PDF document text
    • http://xaxidos.epizy.com/95563964891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1797ed1c-12f6-49d7-9fb2-4ab25a5abb9c/graco_nautilus_65_3-in-1_harness_booster_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/440176b9-95c2-4784-9c29-5a1d5a7767ef/you_should_as_well_meaning_in_urdu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF648 5364 bytes
SHA-256: 385402b2c3cfd0aa42b1c7c2f9ac6ff6807498fc5596c28ada9831e5f6a32b44
font_01_sfnt_off00010876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10876 10752 bytes
SHA-256: 4ebf5d830d2bb1d87a70d204d96f41884d4e4d3495f419ad03fc6d2a2f0494ac