Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6f62d6d8ba5ef4…

MALICIOUS

PDF

73.7 KB Created: 2021-03-19 09:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: be6697673456da0ed8ef47e91cbe85d4 SHA-1: 5208bec58154116a6299b913284bb7654d9a0ed3 SHA-256: cd6f62d6d8ba5ef453cc1e0c798acd1ec36521fb525cfa3f3649bc0c84f28eaa
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF document flagged by ClamAV as a phishing trojan. Heuristics indicate it uses a social-engineering lure to prompt the user to install a browser extension or update, a common method for malware delivery and credential theft. The document also contains numerous external URIs, including a suspicious one hosted on 'xezojetit.ru', suggesting it may lead to a malicious payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://xezojetit.ru/wix?keyword=sleepy+poet+south+blvd PDF link annotation
    • http://oneitstore.pro/vaboduluwisuxl0ijr.pdfIn PDF document text
    • http://totaxusozavu.sportsontheweb.net/tcs_email_writing_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/yEagf9R/kesigenon.pdfIn PDF document text
    • https://cdn.sqhk.co/sopaluwokaja/ojdrihv/31043855968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_601a001ccb88d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467576/normal_60265fdc1e964.pdfIn PDF document text
    • http://vitrinachel.ru/boot_camp_mac_os_high_sierraol5mk.pdfIn PDF document text
    • https://cdn.sqhk.co/juzosugun/e4ijial/lepumaxugefivatipix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381759/normal_5feb8e040ba7c.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/impact_of_advertising_on_consumer_buying_behaviour_questionnaire.pdfIn PDF document text
    • http://9gusevshop.space/free_halloween_flyer_templates_photoshopoyd4s.pdfIn PDF document text
    • http://pristav.pro/how_many_grams_does_a_plastic_bag_weighox5r7.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/RdFgijj/oregon_ducks_women_s_basketball_roster_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462065/normal_602b59758fd94.pdfIn PDF document text
    • http://natur-green.fun/90390370938sjcow.pdfIn PDF document text
    • https://cdn.sqhk.co/rinovizifim/drghhfE/boradijunidunorid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389804/normal_5ff712d08f32d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_701238da2af041e39d96d537087e21c1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc221b2-a45c-403e-91f3-1052c3ca9af4/7613219129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/926e51c6-16a1-4947-ade2-6da973fe4532/what_is_the_opposite_word_for_lonely.pdfIn PDF document text
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_c434b81b33ec411da279611993997fa1.pdf?index=trueIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_e89c828d4bd24a5d8acc60fae021a112.pdf?index=trueIn PDF document text
    • https://f8b57e9d-e272-4783-b6f5-6420e6b93425.filesusr.com/ugd/886b73_6345a947f9b7486fa564b3aa54e6870d.pdf?index=trueIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_e0bf9375b0f24a49b89d21bb4de15db1.pdf?index=trueIn PDF document text
    • http://wororezijetixa.atwebpages.com/62389952496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c7d33b3-b1dd-4b98-b702-fe1b0f88f74c/xumexawaloboketezorud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A6 5148 bytes
SHA-256: 1585a05f971f14c9518122fc65b0939014f8a5d9b0d1bfd34c8882bd4a7d1e7c
font_01_sfnt_off0000ea22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA22 1936 bytes
SHA-256: 246569b5fd7226bd0ebf3c016de7ba0bf82e996896d660a08030b2af0a08efd3
font_02_sfnt_off0000f363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF363 10544 bytes
SHA-256: be5c0488908353f265104cac9d7cdedd65adf812d8baaec2f26f71126c8b894d

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