Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d7a3d121699e22…

MALICIOUS

PDF

81.7 KB Created: 2021-02-07 06:37:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a7832af84a5e374294eec84319a04820 SHA-1: 696d3b871f9ac538bb8c2f08b5a4308013752708 SHA-256: b3d7a3d121699e224fb5c59903579bacc9a4bc7aa011f277b1323f5a7b1fc37f
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with a primary focus on https://maypoin.ru/wb?keyword=batua%20sa%20muh%20song%20%20pagalworld.%20com, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to URLs, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wb?keyword=batua%20sa%20muh%20song%20%20pagalworld.%20com PDF link annotation
    • https://kukurako.weebly.com/uploads/1/3/5/3/135321284/dizevifudof_lemexowa_pupotobuni.pdfIn PDF document text
    • http://lulezuzebat.22web.org/i_ready_diagnostic_answers_8th_grade.pdfIn PDF document text
    • http://xajaweronasuxo.22web.org/81628961746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449793/normal_601cc967748f8.pdfIn PDF document text
    • http://normal-id.com/hero_cycle_herculesp8e7w.pdfIn PDF document text
    • http://moviesaddaa.online/32700943199qv3hl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375541/normal_5fee5375bed7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_600c44014d4c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470399/normal_5fcc07a66e896.pdfIn PDF document text
    • https://gavofazipog.weebly.com/uploads/1/3/3/9/133999173/84e3d807b99.pdfIn PDF document text
    • https://wajadotufa.weebly.com/uploads/1/3/1/8/131857144/a4990a7.pdfIn PDF document text
    • http://trokot-tonirovka.online/crack_photozoom_775mz0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://kefixofelapadi.epizy.com/wooden_lathe_machine_project_report.pdfIn PDF document text
    • http://todojenosefotaz.epizy.com/79450018722.pdfIn PDF document text
    • http://xasonivuk.epizy.com/python_format_json_output_to_file.pdfIn PDF document text
    • http://gasigigi.rf.gd/fexikoliziserimetilo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF3 5660 bytes
SHA-256: 60e5451488577c77898063001ae1d5eb95ea6bc6dfaa86907e2c6a9c02e0f4c7
font_01_sfnt_off0000ef1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1A 3176 bytes
SHA-256: bd903c47404335b53ca1b9d635c17af82eeed2ddd6a1781fb7f857a8d583926e
font_02_sfnt_off0000fc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC72 11224 bytes
SHA-256: 36cdb7a3577e0db2616cedb4c665ab0e58c356e03e3ed738058cc5af81390016
font_03_sfnt_off000122a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A8 6436 bytes
SHA-256: 1f22a90d6e0b6fb94c661b357e36073593bc3df7bceadc82413f883173217698

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