Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95abbf628d5013e…

MALICIOUS

PDF

75.8 KB Created: 2021-03-16 20:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9fbd7726b9860f96ed1478832bf226df SHA-1: 1f4b90eaf16c65ced136d7059522bee835ab9c21 SHA-256: e95abbf628d5013e0e6ab0a9ebc925ca68946f864e8d7ba2dc0547a91f2f3ce7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/123?utm_term=tip+saki+assamese+song+video PDF link annotation
    • http://itslm.fun/elaina_doesnt_mind_writing_and_delivering_a_speechisxat.pdfIn PDF document text
    • http://ladujose.sportsontheweb.net/11010073974.pdfIn PDF document text
    • http://dadivasim.sportsontheweb.net/vufemefizevugiluro.pdfIn PDF document text
    • http://center-san.ru/kajilajatisidikife5lfic.pdfIn PDF document text
    • http://kowuterada.mygamesonline.org/makalah_keberagaman_agama_di_indonesia.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/a8e2ece7-91a4-4fd1-ab9d-e97ffab7672c/how_to_clear_code_on_thermo_king_apu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6616abc5-94c5-4091-9534-118b2daced93/when_is_harry_potter_5_illustrated_coming_out.pdfIn PDF document text
    • http://falariwupap.myartsonline.com/cactus_y_plantas_suculentas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91bfabf8-efa3-438f-b893-a6b944e90ae4/80183483114.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_3f2509d554d345b99d96637f4979a540.pdf?index=trueIn PDF document text
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_e02b5e0feffe493292f79ea6c097730c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a07cf7c-a8a1-4916-ade3-de2296dc853b/how_to_clear_screen_on_casio_fx-9750gii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d56b7b5-3b73-4b56-9c04-c16b14210f12/what_is_a_mos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e503499-aa68-45e6-9568-aa0952ffaeaa/what_are_the_different_types_of_cva.pdfIn PDF document text
    • http://kewetanetoza.atwebpages.com/59598310885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e0fd8e-997d-417a-8c44-780466b5d2bc/cloud_native_java.pdfIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_bada706947a6431ca471ee50e74034cc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b686d4ad-cd92-4ab1-9a52-a882c86c9f11/m_audio_axiom_25_power_supply.pdfIn PDF document text
    • https://82522aca-ea58-4e74-bacd-083e9cf1df26.filesusr.com/ugd/c4dbd3_ddbe5ef6c8e549f38f219864a0b833ee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/384946dc-8398-496c-a7c9-2d38f19bbf0f/zumofofamigazelezamijub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6cdc32-dd75-4e98-9ebd-3599c762a07f/football_manager_2020_touch_android_logo_pack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e2be0f3-9eb0-4b37-b125-1b0ec85ebdb0/why_does_my_smoke_detector_keeps_chirping.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_d60b047d984f4f40af71de1982df285d.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_off0000eb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB42 5224 bytes
SHA-256: 98998289e25b00b4b52aa849f6d0a1e8f311599b774568c71a67336de9463d17
font_01_sfnt_off0000fd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD07 11272 bytes
SHA-256: fb1c54f7e37b959a5f2faa798d37c62c4714e1d0d67c52985193889a96b7a6b1