Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b480d210cf102a…

MALICIOUS

PDF

80.1 KB Created: 2021-04-29 22:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2aedf6e538d10139e2b59274610e6cc1 SHA-1: 123c59cabbbef3663002658402cefc90cd3297c2 SHA-256: 65b480d210cf102a3f2b8d8e02059eaa6609a9ed94d56af0d09ab80622089500
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 0.9993

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://seumenha.ru/strik?utm_term=what+is+difference+between+verification+and+validation+in+software+testing PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386842/normal_5ff0301282966.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/97099095206yu6la.pdfIn PDF document text
    • http://blockingscenery.com/web_design_and_development_jobs_onlinehbg7s.pdfIn PDF document text
    • http://pitikudefojeken.getenjoyment.net/zawesotoxigozedofajuje.pdfIn PDF document text
    • https://tuxativavowaz.weebly.com/uploads/1/3/1/4/131437956/1836157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450045/normal_605979a14cf47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485705/normal_5fc85dc50d1e7.pdfIn PDF document text
    • https://gorumuzupiv.weebly.com/uploads/1/3/4/5/134510920/ced5036ba.pdfIn PDF document text
    • http://laludinemolat.sportsontheweb.net/82328943377.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460944/normal_5ff9acd9a3bd2.pdfIn PDF document text
    • http://xuribof.medianewsonline.com/towud.pdfIn PDF document text
    • https://mesopivupezuna.weebly.com/uploads/1/3/5/3/135311967/joxizebaluxa_lozid_nivibototiwit_retis.pdfIn PDF document text
    • http://rebelliona.online/amazing_god_you_can_do_all_things6y9b7.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/jodemixinakujurogujexewos.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/3a227.pdfIn PDF document text
    • http://fidesuwuranotif.getenjoyment.net/kobufoxavonax.pdfIn PDF document text
    • http://sutarakikim.scienceontheweb.net/19315307318.pdfIn PDF document text
    • http://gnoogle.site/las_dietas_engordan_comer_adelgazatwcr1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wadoromutisagar.myartsonline.com/exhibition_booth_design.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/cairngorms_snow_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/84301935067.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/nox_android_emulator_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/galavelepokaput.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/bootstrap_4_form_field_width.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_off0000f859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF859 5588 bytes
SHA-256: 609520e75e0f2389025a4471dcc666f71a3e23411209b1a03997ef6bfb983b12
font_01_sfnt_off00010b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B74 11596 bytes
SHA-256: 413517c52b0156b45c043d5aa480bd4df89a82f12d341c7d9227b5b615bf3c11

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