Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b19c9d8a27b627…

MALICIOUS

PDF

75.0 KB Created: 2021-03-31 00:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e4fa85d699c475555b8f783fc5fdfaa5 SHA-1: ddc18acc4b3e881b1c0f449f45ba324673a56760 SHA-256: d5b19c9d8a27b627072ac325489587d040cda4ca9dbc587635c73136f2227b1a
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 0.9996

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=the+ex+factor+guide+brad+browning+pdf PDF link annotation
    • http://dapujabowigu.sportsontheweb.net/cinder_book_series_age_appropriate.pdfIn PDF document text
    • http://bositozibab.getenjoyment.net/44593345369.pdfIn PDF document text
    • https://xorexataziz.weebly.com/uploads/1/3/4/4/134496469/tuxubipuz-bemibagunej-siburiturajoxeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370528/normal_5ff2c3775f598.pdfIn PDF document text
    • http://bositozibab.getenjoyment.net/20484869655.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/mitenuvopim-pusugewefixi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369508/normal_5fd03cc354492.pdfIn PDF document text
    • http://fetesitomer.mygamesonline.org/dieta_para_aumentar_masa_muscular_hombres_delgados.pdfIn PDF document text
    • http://gavojutopubiri.getenjoyment.net/easy_banana_bread_recipe.pdfIn PDF document text
    • https://dezipozapuxel.weebly.com/uploads/1/3/4/5/134595234/7431914.pdfIn PDF document text
    • https://jolezage.weebly.com/uploads/1/3/4/3/134336692/1d4f25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408595/normal_6047e8776bcd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422894/normal_5fd1c2a451c9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381980/normal_601b85f07e98f.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/windows_10_bash_python_command_not_found.pdfIn PDF document text
    • https://lajidusok.weebly.com/uploads/1/3/1/0/131070852/wibedarasenuj-jikefi-rabidipufevi.pdfIn PDF document text
    • http://bijowuxupolapi.sportsontheweb.net/5581496257.pdfIn PDF document text
    • https://fexiganariv.weebly.com/uploads/1/3/0/7/130739648/takosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5fdb684a81e19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kubomefewofumim.atwebpages.com/solid_converter_unlock_code.pdfIn PDF document text
    • http://gudukiderunusu.myartsonline.com/fojofaribubibifogolowifin.pdfIn PDF document text
    • http://benamow.myartsonline.com/bupakezudagojos.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_off0000e538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE538 5456 bytes
SHA-256: 011327c5384942be38171a7c1adb158b31ada74dd2db73d336183f7a82571270
font_01_sfnt_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 11424 bytes
SHA-256: 7e286d023ba7879145317c9d4a54dc51721a51327bc258b862b8256dde9ca3d5

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