Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd946fe69d5af7fc…

MALICIOUS

PDF

67.1 KB Created: 2021-03-21 01:30:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 943f9c13f7ee81df7ff027f72988bb6d SHA-1: 53419e161042bb2914ce9788c89714a2486594bd SHA-256: cd946fe69d5af7fcdcaa29d1b0e90ba05fea7e2001b7a850d987a50a71b4edbb
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 0.9997

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://jacksth.ru/123?utm_term=bustier+dress+formal PDF link annotation
    • http://eglo.club/777614148924q5jc.pdfIn PDF document text
    • http://salonapp.xyz/58555968747lhjz8.pdfIn PDF document text
    • https://cdn.sqhk.co/pedajobu/Riiifig/66673670464.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/hb910tA/flight_ticket_booking_app_download.pdfIn PDF document text
    • http://zujoxuxosaja.getenjoyment.net/administrao_publica_estrategia_concursos.pdfIn PDF document text
    • http://naturalik.fun/soluk_mavi_nokta_carl_sagan4lmij.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/rnjiEs8/gojadipa.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/0idqQxK/highway_rider_extreme_3d_motorbike_racing_game.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/ehgYPgc/tiktok_starbucks_drink_4_pumps_white_mocha.pdfIn PDF document text
    • http://rameautbxy.space/mamefimokd6.pdfIn PDF document text
    • http://fijexojor.getenjoyment.net/burger_king_allergy_information.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/voxulija/caister_academy_ofsted_report.pdfIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_d0e7318a125f4712bf55fc3ac0681abd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/gujapumifegozuta.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_ded3767917d04afa987dc0448d7eb0f6.pdf?index=trueIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_62ffed68693c4acba30e44fcc6f50b5c.pdf?index=trueIn PDF document text
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_851e8c68a1db4c09865dbaf61c69e49e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dezajok/online_casio_scientific_calculator.pdfIn PDF document text
    • https://457cefd1-268f-49c0-9ca4-ced5ac281e6b.filesusr.com/ugd/983758_262a176dd1cc4924a8ed8cde6eeebdc9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lazolu/42456433440.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/how_to_add_transitions_in_premiere_pro_2020.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_off0000c862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC862 5100 bytes
SHA-256: 15d3baa5bfed6dd41710cef0dd129af99178dadbd6aef153533efc4c8f80be34
font_01_sfnt_off0000d9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A2 10900 bytes
SHA-256: 99dac3af8b38f597e094398ef265e036178c6daafef8fb85e3d605178fef62e0

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