Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6215e3e70ddb49f…

MALICIOUS

PDF

73.0 KB Created: 2021-03-10 02:34:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d4d25528d86f994e3230f388f422ddab SHA-1: ea229ceef32420cdc136e70f6c907312a8045296 SHA-256: c6215e3e70ddb49f5ba118fd8be6ecc41bbbd67b715e7e4b7c39f6cd142e0941
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 0.9997

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/aws?utm_term=curtis+sno-pro+3000+snow+plow+parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366316/normal_5ff97c396e94b.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/fhayhji/60515134078.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/cnb_magisterio_de_educacin_infantil_bilinge_intercultural.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/ahbhbjj/free_lightroom_presets_for_portraits_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384468/normal_60459caa2800a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391909/normal_6032d9e021240.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413017/normal_60059f2d76ea9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_6024bd816a747.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/d25bacc0-65dd-4ed4-ac69-e779b9c725f1/gubawevu.pdfIn PDF document text
    • https://945c5b1a-9feb-4a08-b72d-c905ca1b1520.filesusr.com/ugd/27135d_2bf1e331cd5f43d48c6739e9c9fcd2b7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c4688e7-c96e-4437-ad61-ca3adf7a435f/easa_electrical_engineering_pocket_handbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8403cbd1-6d52-42c1-8d0e-69ad552617ee/62433075640.pdfIn PDF document text
    • http://mojogisi.epizy.com/rebugesawudekupak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386226ab-bab3-49c0-bfdd-afbc15706591/diccionario_biblico_hebreo_espaol_luis_alonso_schokel_gratis.pdfIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_eb81b1e89157413ea79e307d1108aeea.pdf?index=trueIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_a921c7e77f51435388c940310a810e6a.pdf?index=trueIn PDF document text
    • http://sowawobajomo.rf.gd/company_logo_design_template.pdfIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_dcc56ff1c63a4a189b568e5731148554.pdf?index=trueIn PDF document text
    • http://zorijefugixor.atwebpages.com/astable_multivibrator_practical.pdfIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_768b3e1f4e1b4b139c426ef8934a5880.pdf?index=trueIn 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_off0000de61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE61 5148 bytes
SHA-256: 72b0e1c1a743f933a9ea2af90c00f33064789a89c1777b574c106f297aa5478d
font_01_sfnt_off0000f005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF005 11528 bytes
SHA-256: 543963e89e62b59ce869bf70930b2b1f103c63da9ab769469df7b30856527b30

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