Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd25f0a60a866f6c…

MALICIOUS

PDF

73.7 KB Created: 2021-03-08 15:06:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 19913d0981ce4b1dc185b8e3fc6af421 SHA-1: 27f42083e85ffc299480ddab9fb36ec897491565 SHA-256: bd25f0a60a866f6c28f0d45b0c3c6d2769597a78395daba6d44934c3bcef3217
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=amls+2+edi%25C3%25A7%25C3%25A3o+pdf+download PDF link annotation
    • http://kedepoba.sportsontheweb.net/kemolegedevenegodarivim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446038/normal_5ff145b16d977.pdfIn PDF document text
    • http://xezupotivevilib.22web.org/how_to_draw_a_anime_full_body.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/efRBkhd/fill_juice_glasses.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/onkyo_tx-nr686_reset.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/30340905228.pdfIn PDF document text
    • http://zaxiluxedexu.getenjoyment.net/73967250809.pdfIn PDF document text
    • http://desolasi.iblogger.org/95272033011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_600dc57391089.pdfIn PDF document text
    • http://bobujopolodusol.mygamesonline.org/zomevevumalis.pdfIn PDF document text
    • http://fitatuvepejozo.sportsontheweb.net/how_to_prove_parental_alienation_in_court_north_carolina.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/1623650781.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/j2heTib/wingsuit_flying_deaths.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/63747818911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_5fe827c1e5275.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/menoji.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/puvetefubir.pdfIn PDF document text
    • http://foweroboxufafuv.epizy.com/23276071267.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/guideposts_educational_foundation_limited.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_off0000e076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE076 5804 bytes
SHA-256: ea2afea573a07f2cc5823f8d5eedeb175df260c6aaba870ef0f1e6574d717278
font_01_sfnt_off0000f3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A8 10904 bytes
SHA-256: 9f4c9f076a99ba532b3971dd7ad9b024229444e6a459c5f3b9430b032d09c94f

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