Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd71d674003ccedf…

MALICIOUS

PDF

75.2 KB Created: 2021-03-08 11:32:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6ba088c1b5d4fc63f47927ec1d49d59f SHA-1: 3af1d1ffe04bb96261e7eef835a62d9cbbf6f2da SHA-256: fd71d674003ccedfcf11ac3a4c5c52becfa3fedc759c8bbdeed24063fdbf0204
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/award?keyword=auditor+general+report+petrojam+pdf PDF link annotation
    • https://cdn.sqhk.co/daxerarugak/vgfgd40/joltzdude139_borderlands_3_moze_build.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/GmgCjdj/sanirerepivubopimugituji.pdfIn PDF document text
    • http://websporizle4.com/2069750826118ttf.pdfIn PDF document text
    • http://ipoteka.net/mitemimagedogatakgjxdz.pdfIn PDF document text
    • http://neo-tp.ru/how_to_connect_atmos_speakers_to_onkyo_receiverg1n9a.pdfIn PDF document text
    • http://itash.space/tav_prasad_savaiye_lyrics_in_englishry3or.pdfIn PDF document text
    • https://cdn.sqhk.co/xekawiba/ijdjahb/sakura_school_simulator_mod_ios.pdfIn PDF document text
    • http://servicesforsupport.com/stock_trading_for_beginners_amazonjihif.pdfIn PDF document text
    • https://lilafigofuku.weebly.com/uploads/1/3/1/3/131398347/0eb95f8589.pdfIn PDF document text
    • http://pejelurim.getenjoyment.net/concepto_de_investigacion_segun_autores_2010.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/which_of_the_following_statements_is_true_about_advertising_by_a_monopolistically_competitive_firm3dzbj.pdfIn PDF document text
    • https://xipurewaxo.weebly.com/uploads/1/3/4/7/134759043/befow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/da9c6c63-ba61-4d3a-a19c-725de0c739c6/40106246822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2229385e-b3d4-4dc7-81dc-6326ee3e9a95/is_after_we_collided_a_sequel_to_after.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de77b3f-b47b-4865-aab4-e494f8b3c408/francis_galton_hereditary_genius.pdfIn PDF document text
    • http://tulajadulixo.myartsonline.com/zotokimibas.pdfIn PDF document text
    • http://jetotajasavesi.atwebpages.com/54960844721.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_off0000eb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB42 5248 bytes
SHA-256: b76c4ad316f519ba40607b42cc24d4390fa41b4411079b59ae60754ee08f1ebd
font_01_sfnt_off0000fd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD11 10164 bytes
SHA-256: d2ecee012f921f79f0b427f25ae2ff993ae9e8b27c88f0a37fcc227635f4ed3e