Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccebb1b117d33dbd…

MALICIOUS

PDF

77.3 KB Created: 2021-03-29 08:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 71a141a9e52949db516b2cd848f87039 SHA-1: 8a120796ff8c286dd55060aac4663e2fa1e1da36 SHA-256: ccebb1b117d33dbdb7938de3f71e9574fddfc33a28fe56dd19d70f3ccf6e6142
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://ponafet.ru/award?keyword=critical+applied+linguistics+alastair+pennycook+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367923/normal_60341a41e1992.pdfIn PDF document text
    • https://cdn.sqhk.co/nulojokine/djenJgi/49897745091.pdfIn PDF document text
    • http://domensita.fun/jepapolojimaz1jsai.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370265/normal_5fe5804cce393.pdfIn PDF document text
    • https://cdn.sqhk.co/padirazemi/MXhiwBh/online_reading_lessons_for_kindergarten.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/63164662527.pdfIn PDF document text
    • http://mafejaruvoje.sportsontheweb.net/google_cloud_developer_cheat_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/iigtjiC/best_jump_rope_exercises_to_lose_weight.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490273/normal_601690d73cc97.pdfIn PDF document text
    • http://comp-arenda.site/the_daily_stoic_espaolxcb67.pdfIn PDF document text
    • http://golden-bridge.pro/fodavisameralapelokev5whem.pdfIn PDF document text
    • http://repair-monokoles.ru/virginia_diner_restaurant_menui5g0k.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/8008ad18-8431-495d-acc8-c4c9011f8c3b/15318429214.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/what_is_the_fastest_way_to_learn_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe095ef-7d17-45bc-a82f-0cff7f0173b7/lufadibivulam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a72962-5c44-4a16-b85f-24ebf2827cac/different_sources_to_use_for_a_research_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/2014_chevy_malibu_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a51c846-f7ca-45c7-9544-1872e2c96f55/comparing_fractions_worksheet_3rd_grade.pdfIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/matuniwufisuwitaga.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/cambridge_maths_example_sheets_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b750db5-3d7a-48e0-8495-a213db165e40/para_leer_al_pato_donald_epub.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/waterfall_chart_template_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/spalding_portable_basketball_goal_parts.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_off0000eee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE2 5396 bytes
SHA-256: a4a24f5319bc5562a8f002852712e11d8b8696240334105285fcfcbd4c1266ba
font_01_sfnt_off00010154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 11300 bytes
SHA-256: 39bf701fd75f6a5bb2553eb8c0e67c80a77d1bf49a6ef007c564da1544c699a1

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