Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7349cc9d9c96ac3…

MALICIOUS

PDF

78.1 KB Created: 2021-03-26 03:09:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c5c634d252cf116ab1df62272d430b35 SHA-1: 35d38d6e6d3d3b9f9887b1fe1602567e2d04d12d SHA-256: e7349cc9d9c96ac3e6b7ab272ff77ee3b2b20f75e92b26aec1398a0b9cdcf255
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 0.9998

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://xajibur.ru/123?utm_term=free++film+behind+enemy+lines+2001 PDF link annotation
    • http://nefuzixitelu.iblogger.org/tawimarudepowutuvewupaki.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/cB7HjgB/dead_city_book_1_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/bcjhhhx/genghis_khan_conqueror_of_the_world.pdfIn PDF document text
    • https://cdn.sqhk.co/mejapevelu/hLUAifi/5592558628.pdfIn PDF document text
    • https://midunaso.weebly.com/uploads/1/3/4/6/134680252/419a41f93f.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/xusuwanerawupuriletadul.pdfIn PDF document text
    • http://ccckkkkk.space/autodesk_plant_3d_2020_system_requirementszv2ae.pdfIn PDF document text
    • https://jedopebo.weebly.com/uploads/1/3/4/8/134889916/xetot_bibiworun_buriponabevefi.pdfIn PDF document text
    • https://nakaleraba.weebly.com/uploads/1/3/4/6/134606700/3295118.pdfIn PDF document text
    • http://sovuradema.medianewsonline.com/pdf_to_jpg_converter_software_download_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/TgggfEx/pubopajerosilorefuw.pdfIn PDF document text
    • http://biotringel.shop/hand_operated_sheet_metal_foldern7glm.pdfIn PDF document text
    • http://xozivupanivos.22web.org/ey_robotic_process_automation.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/gCXH5ja/dude_perfect_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/finding_equivalent_fractions_worksheet_year_3.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/85281671353.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/joe_gomez_injury_report.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/datasheet_view_in_sharepoint_2016.pdfIn PDF document text
    • http://jodamedorofile.epizy.com/44782031187.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_off0000ee02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE02 5460 bytes
SHA-256: c4f73f07407e769ebf7e650d845f6d7d919c710dbcffe1476d0d972105f67987
font_01_sfnt_off00010076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10076 12564 bytes
SHA-256: 256805042cb597260c2c301a48fefac3fca671f15bb144a4bfeaf48d7be15d70

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