Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5eea2b3256d929d…

MALICIOUS

PDF

134.2 KB Created: 2021-05-03 00:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a298c75ab7c2c0b86e792b1f1a9b4929 SHA-1: c073e7090357febe7cfe173004772a6b4084f9a8 SHA-256: d5eea2b3256d929dbebe6d1d20c6bbbac9870a06f5b77285e80f068b67950f2a
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 0.9996

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://seumenha.ru/strik?utm_term=el+proceso+de+investigaci%25C3%25B3n+social+cualitativo+adri%25C3%25A1n+oscar+scribano+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467979/normal_606b1f23acf4d.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/jogakizukosavalozotijowa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365619/normal_5fdf14d8869ab.pdfIn PDF document text
    • http://munupesifak.22web.org/funidefajejo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423188/normal_5fc8f0be57f47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454299/normal_5ffb66949401f.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/becd9004-db89-4f71-8c4e-1860eb6cd50a/10095826343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c67ff499-eec9-4234-9db7-2da1ae57bfe6/61052915051.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/nopuxigufumivekegos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb3f84a6-baa3-465c-9ca9-ceadd376434b/42226240138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d89bfffc-4ce4-4b23-bf66-fb4b28a3b99e/how_to_use_a_mophie_powerstation_plus.pdfIn PDF document text
    • http://zikenonuto.epizy.com/brother_xl_2600i_sewing_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/minnie_mouse_jumperoo_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0387c57a-404c-46ec-8c13-3733a7146b10/clicker_garage_door_opener_instructions.pdfIn PDF document text
    • http://fezovabanufoben.epizy.com/slope_protection_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d7ff6d-5ad0-46a3-ae3c-8b55b3084e85/the_secret_garden_castletroy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ea674c-c798-4124-9514-ca9b0a0444f6/sample_science_fair_project_display_boards.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/69223733917.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/burlodge_rts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c22484b-1ebd-4825-b61b-b63d3a61467b/monster_movies_2020_full_movie_english.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/1390377206.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/easy_voice_recorder_apk_android_2._3.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_off0001c815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C815 5848 bytes
SHA-256: 929fef432c13129a76ef8145a68782e0bb20d1e64967e97d77bb6b2fb40c5fbc
font_01_sfnt_off0001db3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB3C 14468 bytes
SHA-256: 3ca8d9ca85d6d45bd2ea0a80e18793cc37e83f5ec83e370718fdfa4f44c7ed47

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