Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ccc67489e0de88…

MALICIOUS

PDF

84.1 KB Created: 2021-03-30 05:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2192042dee887f3a61cb06ded61c0b3f SHA-1: 8ef3a252502c8385a31866d607ea39e1ef9d50c9 SHA-256: e8ccc67489e0de88b420b8ec744958771fabcb70deb841fb49485e43d4346570
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with at least one, 'https://dugedepap.ru/award?keyword=landscape+in+architecture+pdf', being flagged as a potential lure. The PDF structure also suggests it's part of a link farm hosted on disposable domains, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/award?keyword=landscape+in+architecture+pdf PDF link annotation
    • http://instapodarok365.site/shakespeare_macbeth_plotq4dka.pdfIn PDF document text
    • http://maykistore.ru/kezisakipofowezmxy.pdfIn PDF document text
    • http://fofosefazu.iblogger.org/50748841409.pdfIn PDF document text
    • http://miwodenexiz.iblogger.org/debolomosorefafawusud.pdfIn PDF document text
    • http://fertpin.online/barcode_scanner_android_studio_javak5f06.pdfIn PDF document text
    • http://vzroslyh.net/trio_axs_4gyad3y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_c40ef0c739bc4be19cdf8df46ea694f5.pdf?index=trueIn PDF document text
    • http://suxugumisa.epizy.com/barium_electron_configuration_spdf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c634e6-7523-4ac9-a638-1a945307edb6/how_many_episodes_does_tokyo_ghoul_season_3_have.pdfIn PDF document text
    • https://f78a7b13-e75c-4ddc-9f3c-03cd83736f6c.filesusr.com/ugd/90c53f_3ab2ed1b2a544a90bcb408063eb5f52a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b23e5c5-dba6-4e6c-aa3e-de3f91a36615/crafting_and_executing_strategy_thompson.pdfIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_aec7ea28d30a4c04ba847de3888e1e4d.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_e97329a56be5497884a1bebb987e73f2.pdf?index=trueIn PDF document text
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_19cd5a0c788b41c1a25f2c4d46a54531.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e739c4b9-0e39-4e87-9c16-ebf349f72ac9/62960958923.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/cuales_son_los_titulos_y_operaciones_de_credito_en_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/bi_weekly_payroll_calendar_2018_template.pdfIn PDF document text
    • http://wogulixa.epizy.com/34489485352.pdfIn PDF document text
    • https://c9254e9e-0e71-498a-8384-ab4c929b52b4.filesusr.com/ugd/0699ff_8be2963dd8294a73867c56432b1a1c0f.pdf?index=trueIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_8b49e7ad8df14bf696096e0bc23cb96f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/roxawo/leeds_building_control_application_forms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/178b9d4a-1dfd-42cf-847d-7495d3b0abdb/2010_town_and_country_touring_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/89585055630.pdfIn PDF document text
    • http://kusuganuxe.epizy.com/71798210696.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_off00010bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB7 5152 bytes
SHA-256: ab72c95d9bccdc870998b757dedaba967b056b9bedbc0955c9cb15c435239da5
font_01_sfnt_off00011d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D45 11072 bytes
SHA-256: e6106b0e6c17cd3e679361b184875fee75f24399307d749b67af2b58f675a0d0