Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a9f47317738eb2…

MALICIOUS

PDF

84.4 KB Created: 2021-04-01 11:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e6e9df53f1cb192b195d42496e4deeba SHA-1: e34812c10ee642b7828835518f5512386baedabf SHA-256: e0a9f47317738eb2eb9e95f393c576bc761eb2ed477b6fe954b2eb556aa44c25
126 Risk Score

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 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=glencoe+geometry+chapter+10-+5+answers PDF link annotation
    • http://wudaxozibutix.sportsontheweb.net/vicks_cool_mist_humidifier_filter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478933/normal_6031f662ba6ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471723/normal_603049063aa24.pdfIn PDF document text
    • http://sumigemag.mywebcommunity.org/autumn_leaves_piano_notes.pdfIn PDF document text
    • http://groby-ritual.online/cambridge_english_testkl06c.pdfIn PDF document text
    • http://mavafesumej.medianewsonline.com/lugorinanuberabaluxa.pdfIn PDF document text
    • http://vinnipoh.fun/the_four_spiritual_laws_of_prosperity_a_simple_guide_to_unlimited_abundancer71di.pdfIn PDF document text
    • http://sovumeriwox.mygamesonline.org/73772514796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_6056f6eb962e7.pdfIn PDF document text
    • http://lupazul.mywebcommunity.org/mycenaean_civilization.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385634/normal_60610041da598.pdfIn PDF document text
    • http://terugate.mypressonline.com/does_the_kitchenaid_mixer_have_a_food_processor_attachment.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408997/normal_5fffc1ee76131.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
    • https://uploads.strikinglycdn.com/files/dae23c17-4dc2-4b10-8bf1-6de85fb84368/what_is_the_atomic_number_of_first_20_elements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69d4f229-29fe-4ccd-8d9d-78867ab30a29/zegomebasinalovitejij.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/fitbit_ionic_product_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/60593201660.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/star_wars_quiz_questions_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/endnote_citation_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13cd28e3-4522-4c46-9d4f-fdfcb7ee3c5d/how_to_remove_honda_lawn_mower_blade_adapter.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/microsoft_brand_guidelines_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be5c6395-31c4-437b-b162-c856a515f7bb/juwapuvekunixadiretorex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a655bf-9e09-4707-8076-0a9782a1a946/61479163307.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/broncho_vaxom_sache_bula.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/37715464741.pdfIn PDF document text
    • http://vasakuzepilaxi.onlinewebshop.net/30972796838.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_off0000f9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C0 5664 bytes
SHA-256: 15c2b5b6477da03482527cca8a2aacbb7e12cfda168a957a50d2e67a119195ff
font_01_sfnt_off00010cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF8 11500 bytes
SHA-256: 85a7126031e324174bba33b590ad59ea8e09e4601ee4bf68e0c028f815f30b73
font_02_sfnt_off00013402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13402 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361