Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc0d2e2ff4cce98…

MALICIOUS

PDF

78.2 KB Created: 2021-03-27 22:09:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 932d22fcd36209d329e3d6b64c2a71c6 SHA-1: 3f78cbf1a21379736a47f6dbfec1da8b53ea0579 SHA-256: bfc0d2e2ff4cce9828dc31efaacd3ddc6b921d303aa2d8a2642c8fd26e869cf6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9961

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://jottigo.ru/wix?keyword=gurbani+pdf+books PDF link annotation
    • https://cdn.sqhk.co/tumowara/8hajjgj/zovibeluxufudopowif.pdfIn PDF document text
    • https://cdn.sqhk.co/xobupiba/jhwjfQP/the_hack_driver_extra_question_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Goge6ib/lean_bulk_workout_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/fpDjbJr/stick_war_legacy_mod_apk_unlimited_upgrade.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/diePgdE/30910470408.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/SDjcTQ8/37465024754.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/1cxjjjj/download_highway_wars_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/dimowitop/jggjhba/soxipodonelozajem.pdfIn PDF document text
    • https://cdn.sqhk.co/wafexumu/igggifs/15028588744.pdfIn PDF document text
    • http://kubodir.22web.org/wukuninirin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zebinagapovu.epizy.com/arcgis_10_tutorial_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cbf19d0-7a49-4c29-bf4b-f949953ef50c/how_long_should_a_pentair_pool_heater_last.pdfIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_e24847c305eb4af4abd85ffb8fd92fa3.pdf?index=trueIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_f714f0a0f292404287f93e17b1ee5558.pdf?index=trueIn PDF document text
    • http://woxesuguve.epizy.com/25735727269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc13595-8a0d-4387-847d-5c111906fc34/76484666681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80381969-922b-4024-814c-ac1ad2e5d5b3/what_painkiller_is_best_for_period_cramps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff530e78-e2f1-4d75-8eb6-488cc3a876a7/wizojelisunuguvuwaf.pdfIn PDF document text
    • http://junedujivoxoz.epizy.com/adobe_photoshop_free_7._0_password.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_ff82ab4627684ea1bd602397826ba18f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/910cbb34-f85f-42cd-be53-dbb8cb5dfbd2/el_diario_de_greg_3_pelicula_completa.pdfIn PDF document text
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_7364d3934492491c9d1580dfaa1b91fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3766ee1c-4d8e-4fe0-88c0-b24b07ab42e3/5381062573.pdfIn PDF document text
    • http://lelogesisuzekat.rf.gd/domine_las_aperturas_de_ajedrez_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2bd31c1-25ca-408a-9042-93d70caedd27/wiferazadiwej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bfda765-5252-4848-96e6-5acffae2be84/wisufobeza.pdfIn PDF document text
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_7b94c9f10a944911b9f1cfa514f5117d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a71efb97-3a5d-4390-9c1c-5bc0f2bcd8d5/what_is_american_folk_music.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_off0000f243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF243 5240 bytes
SHA-256: 4b8cbe3fe1e418068a8153a09916f6f8543359fccdf2ec0a0590d5c8405e07b9
font_01_sfnt_off00010426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10426 11132 bytes
SHA-256: 390c17a640c890e5a63f36dd982bc0aad3913599f87dc3827125e28bd2543ce9

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