Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1e459264ed0cdba…

MALICIOUS

PDF

75.9 KB Created: 2021-03-14 14:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9a62d837b49377b3587979ca9e49bdac SHA-1: 229aa52ce11c323e8e3dc7a6863a3a6df3c40c37 SHA-256: a1e459264ed0cdba3691d612262306d4eca850c44c4a01b98d28ff53dc587e89
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 0.9948

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://jottigo.ru/123?utm_term=agritrade+resources+annual+report PDF link annotation
    • https://cdn.sqhk.co/xororofomed/qhhYGha/facecam_avatar_face_emoji_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/basinasedu/jib5jhZ/knights_of_ages_saoirse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426410/normal_6020fa865bb21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465131/normal_60368f5a97da1.pdfIn PDF document text
    • http://reabook.online/context_clues_worksheets_multiple_choice_2nd_graderfzni.pdfIn PDF document text
    • https://cdn.sqhk.co/tisojubew/UBhcidc/farmville_2_country_escape_cheats_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412165/normal_6041322b69ac5.pdfIn PDF document text
    • https://cdn.sqhk.co/zosaremarebi/GjfkglA/61169307929.pdfIn PDF document text
    • https://cdn.sqhk.co/sowumavag/gdDjfKs/konibe.pdfIn PDF document text
    • https://cdn.sqhk.co/rowubuvuke/g5HIKjf/sip_stop_form_for_axis_mutual_fund.pdfIn PDF document text
    • https://cdn.sqhk.co/rogokivika/im6icwJ/brigada_news_davao_reporters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446398/normal_602f52acbda26.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/HihfZhe/nebulous._io_hack_download.pdfIn PDF document text
    • http://winoraama.space/73726826032dt8s5.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/hie5xhc/gun_simulator_builder_3d_mod_apk.pdfIn PDF document text
    • http://gooddevice-online.com/urine_cytology_reportingno05q.pdfIn PDF document text
    • https://cdn.sqhk.co/zapevexuvot/uhdgclN/force_master_chief_of_the_navy_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/1jiQSsx/download_ninja_hero_cats_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/iixjfhe/piwuzomik.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/Hggihi2/77902099672.pdfIn PDF document text
    • http://herss.space/tamil_movies_madras_rockers._comwd0y9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489988/normal_5fc628a6c0446.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/iegfk8N/mesitukogujalivaxolutidix.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/12cfd12c-7d61-4133-a04c-b7351b02a79c/itil_intermediate_service_design_exam_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6691a57a-faee-4615-8454-2fc248b80ce7/96760372643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96051c4-111a-41a0-abe9-4e786333bfca/lenovo_g50-45_80e3_drivers_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7e1776-13eb-4e5c-8e7c-77f0cf243e30/wordpress_missing_zlib_extensions.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD353 5232 bytes
SHA-256: dce835555e21538772459ba3709e6b8a92528f4eb8a86a3c6e60008684a50acd
font_01_sfnt_off0000e534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE534 10844 bytes
SHA-256: eb96d8196e6692ae6405e02541fb1e0522bb95a8747772c64478f5ecf6b00fc3
font_02_sfnt_off00010a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8C 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e