Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a3c7166575cdb6…

MALICIOUS

PDF

81.2 KB Created: 2021-03-24 10:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9483d90a76426093d69c48032f5b08ed SHA-1: 9ce3707e6800db8922625cc28a04a21057c9c1eb SHA-256: 64a3c7166575cdb61177abf8e9a98ec7c81c4cea5e05b87840e199d504ebb726
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://soxebez.ru/wix?keyword=ud+men%2527s+basketball+recruiting PDF link annotation
    • http://dewisazovuvoxi.mywebcommunity.org/bedexajebed.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/what_is_the_healthiest_bread_at_subway.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/suicide_notes_book_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/igUjcAr/24854037433.pdfIn PDF document text
    • http://vedemali.22web.org/panasonic_kx-t7453_turn_ringer_on.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/4nEFihg/map_of_ukraine_crimea_and_russia.pdfIn PDF document text
    • http://soferijivav.getenjoyment.net/33245420320.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/xzIidjf/jefufilotawawiku.pdfIn PDF document text
    • http://lebojabufi.medianewsonline.com/2987342573.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/655290547.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/bij6eUE/gravity_falls_garry_s_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/aeTd2uS/3d_animation_maker_free_download_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/lTFF1ZL/39886966701.pdfIn PDF document text
    • https://cdn.sqhk.co/digiwejasipu/fgjpNje/tepiwuj.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/fhhhjhi/pass_the_bar_exam_with_flying_colors.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dijixat.rf.gd/rumebudivosigakazenarewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0602d5da-42cf-41d2-a5b2-a50bb357ff3f/lg_v20_power_cord.pdfIn PDF document text
    • http://vuvazapej.rf.gd/foverizeguro.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/lg_lfx28968st_ice_maker_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a10c29-7602-4014-88a6-30a652379801/wordpress_download_mac_free.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_off0000fd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5E 5488 bytes
SHA-256: 28128b22f3e4ef290f673562219bd2f5b9f4099cd0476e8b7f42d3adc9a8d42d
font_01_sfnt_off00010ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFB 11056 bytes
SHA-256: 0b097e4d9e6746847c42a398c5c2e2f853db9b933d6e162f1ce9fd03af11c07e

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