Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed8e60151722665…

MALICIOUS

PDF

79.0 KB Created: 2021-03-14 23:12:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: dda819abf7498257ad1be1e99ff5bf7b SHA-1: 47b3316f0ce07f26fea76df94301df8524da29f8 SHA-256: 9ed8e60151722665187f6a514b2046f5f0283caf24caf7e64ee0351163c209b2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism for malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a deceptive link structure.

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://maypoin.ru/wix?keyword=the+challenger+sale+full+book+pdf+free PDF link annotation
    • http://loduwij.scienceontheweb.net/what_is_physical_therapy_rehabilitation.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/how_to_transfer_decals_to_glass.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/83480505478.pdfIn PDF document text
    • http://misstourist.info/titanic_music_sheet_recorder4xkbj.pdfIn PDF document text
    • https://cdn.sqhk.co/lawipavoso/jeoijjb/vidmate_for_pc_windows_8._1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490269/normal_5ff5338ff40d8.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/gjc9VwZ/white_tripe_for_dogs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402262/normal_5feb3e9413390.pdfIn PDF document text
    • https://cdn.sqhk.co/balatexoriv/a8ig9Kz/45103242210.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419645/normal_5fe127ac3738b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413585/normal_603ea3e2020e6.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/eFihJie/18080840294.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/gggopvn/bubble_tea_maker_game_online.pdfIn PDF document text
    • http://iqecoportal.ru/architecture_components_navigation_androidzqmce.pdfIn PDF document text
    • http://golosa-spasibo.ru/why_does_my_bose_wave_cd_player_skipu26fl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_601480f7b45ab.pdfIn PDF document text
    • http://wusokamojifel.scienceontheweb.net/what_order_to_kill_bosses_in_dark_souls.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/wolina/75796263832.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/xaneb.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/capabilities_statement.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_off0000f585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF585 5572 bytes
SHA-256: a10e8f3e9a76747205eb261984db0ef14b66c2ca27e90d04128bd468d2c30200
font_01_sfnt_off00010869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10869 11252 bytes
SHA-256: 15c0f4b9b4b27ba863f76182c1c2f56928c08dfb94cc8b91531414acff4e1162

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