Malicious PDF — malware analysis report

Static analysis result for SHA-256 da227c0ba2ca4ee2…

MALICIOUS

PDF

76.3 KB Created: 2021-06-06 06:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b4c6e423206c916934426718ebd40104 SHA-1: 7274cfb8479bf142fa054a8e4c382d0c4f4d40c2 SHA-256: da227c0ba2ca4ee25c2ea3d92ef9c6f98f544467b7a8d177dfc4d325b6c62656
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 0.9998

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://jumiwimov.ru/123?utm_term=create+label+template+in+word+2010 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459326/normal_5fd155a1551b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451544/normal_605c0a554e3e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mibegenav.pbworks.com/w/file/fetch/144438939/87950774884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac747231-d7ba-4017-ab97-f36c78b110c9/19357546154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddded1cd-327d-4b84-be4d-2c04170c0170/kowisefosimaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/002dea27-397c-4446-a0ad-5a5803efa20b/vifazatozefawejopebemupe.pdfIn PDF document text
    • http://fogofalo.pbworks.com/w/file/fetch/144697932/27959945868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e0cc05b-fe8d-4e30-b2a2-0a2f254957d2/31541210741.pdfIn PDF document text
    • http://naxoxututal.pbworks.com/f/primo_water_cooler_cleaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2149b6c3-dc0e-4bb8-bfb6-f4fc4abfd7ff/2013_jeep_grand_cherokee_limited_sport_utility_4d.pdfIn PDF document text
    • http://rumusapage.pbworks.com/f/game_sakura_school_simulator_untuk_pc.pdfIn PDF document text
    • http://supijexed.pbworks.com/f/handbook_of_informatics_for_nurses__healthcare_professionals_5th_edition.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/w/file/fetch/144422955/benvolio_and_mercutio_relationship.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e903c1d-a15a-442e-9b6a-7d6b379b93b1/jerarquia_de_operaciones_y_uso_de_parentesis_ejemplos.pdfIn PDF document text
    • http://degagogo.pbworks.com/f/patterns_of_world_history_volume_1_4th_edition_ebook.pdfIn PDF document text
    • http://xetuduju.pbworks.com/f/castle_clash_hack_app_free_download.pdfIn PDF document text
    • http://refarumiba.pbworks.com/f/vesusipuvusolewul.pdfIn PDF document text
    • http://juxivos.pbworks.com/f/jio_mobile_me_uc_browser_kaise_download_kare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/512bf474-9881-4766-9a40-5b83e7bc06c2/24690736596.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF9 5296 bytes
SHA-256: 2049fc04262362af36990eaf04aac531af3e10b70e1d378c21a9a69f970ecb94
font_01_sfnt_off0000f1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 10408 bytes
SHA-256: 63fd47cb86341d43128f09e914a557e7fd14e0891e84c4ab860a8dc55d0b0f18
font_02_sfnt_off000115a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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