Malicious PDF — malware analysis report

Static analysis result for SHA-256 0997e86642918f08…

MALICIOUS

PDF

78.5 KB Created: 2021-03-04 16:46:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fef9e5db08617085c6c91bd654b7bf83 SHA-1: 9b48cf974ae26dfa7a7439ec18ceba7ddc320fd1 SHA-256: 0997e86642918f08156ea9559d51bb68fd2161d0eb2d04e57c4616c998aff252
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 0.9997

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://soxebez.ru/strik?utm_term=are+long+haired+dachshunds+double+coated PDF link annotation
    • http://tixshopclub.fun/pilgrims_progress_movie_2019_dvd1zxl6.pdfIn PDF document text
    • http://itravelgr.com/boom_beach_base_builder_game_runtimexj69b.pdfIn PDF document text
    • http://biweekamnf.com/zekamufokaferuouyfe.pdfIn PDF document text
    • http://beliyden.xyz/kogetatogutapapanixccv4t.pdfIn PDF document text
    • http://xufunuduxatene.iblogger.org/centos_6_64.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/nagudagepidigi.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/applied_machine_learning_in_python_coursera_quiz.pdfIn PDF document text
    • http://beamorem.com/pimorivirosegatigetwf2v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roronusosewurul.epizy.com/wupedosem.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_e5d7e451846d45f8a74aa5693774b98c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/29971754776.pdfIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_6f5bcdea2ee540e5882799502aa84f8b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fovezewi/igloo_ice_maker_power_light_flashing.pdfIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_bfdee7ce228345b68ea135b6b808fac0.pdf?index=trueIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_fbb6c1b8919b4e3da88ea0b845030b9b.pdf?index=trueIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_3e1a27eb2f514ca0bbf5d64caa177454.pdf?index=trueIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/cuanto_mide_el_metro_cuadrado.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_2c41c126489b40b9bbc7167253dc763c.pdf?index=trueIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/butorasuvofi.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/diwali_invitation_card_templates_free.pdfIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_e7d9c2815515490889cf9f4c1542e6be.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_off0000f4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E2 5328 bytes
SHA-256: ff01bee0372af19f1b7f68754c29237a5214fc9bc2ede8eaaa02faea05670f80
font_01_sfnt_off000106f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F3 11052 bytes
SHA-256: d92869988c310482f3be3c9405b3e1f061eca9760435fe5e210ed1db22565a44

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