Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26aeeda322a4383…

MALICIOUS

PDF

73.8 KB Created: 2021-03-31 23:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3ad948c9df2c35aa4750936887c2a50e SHA-1: 11cab0d9016310e302dc3eb50de1f23df6da0ab6 SHA-256: c26aeeda322a43833c8378bdd24e264831533e506824ca7f78c64a0411e603db
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 0.9993

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://midufefew.ru/wix?keyword=perpendicular+lines+worksheet+gcse PDF link annotation
    • http://jalosus.mygamesonline.org/63630547900.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/N5sghhf/46769188323.pdfIn PDF document text
    • http://shop-kid-toys.online/59912154988m726x.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/dungeons_and_dragons_cartoon_tv_tropes.pdfIn PDF document text
    • http://yandex-dostav.ru/polaris_scrambler_500_service_manual_free_download968ed.pdfIn PDF document text
    • http://zzzmmmmejjj.space/gipefinuvoromomikanicqjh.pdfIn PDF document text
    • http://jobatuzuru.22web.org/61172861809.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/jjicggQ/zuzopaniw.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiwurixiwo/jjjMKtj/rechargeable_flashlight_reviews_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387938/normal_5fde3b0a04439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444117/normal_601791221b364.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/pjSgjjg/4491302599.pdfIn PDF document text
    • http://adv-workshop.site/race_car_vehicle_dynamics_bookvgiap.pdfIn PDF document text
    • http://phillipen.online/nordictrack_t5zi_specsi2cuz.pdfIn PDF document text
    • http://jijoxep.getenjoyment.net/39341912559.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/how_many_pages_are_in_the_first_harry_potter_book_us_edition.pdfIn PDF document text
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_269fbcdcc4654c09a2ae5db3200ffec4.pdf?index=trueIn PDF document text
    • https://ac6a5e95-3fab-4d4b-a7e7-0ef4c71e5929.filesusr.com/ugd/32c278_b11701220ef94253bf171d2810db4f1d.pdf?index=trueIn PDF document text
    • http://tuxefunuzire.atwebpages.com/should_i_go_to_disney_world_in_2021.pdfIn PDF document text
    • https://7ef7ebf0-bcb0-4ca2-8538-5a19c3e9f01c.filesusr.com/ugd/aff7ca_91d28522582944679849403f3a34ced1.pdf?index=trueIn PDF document text
    • http://nekipusixewid.epizy.com/blood_bank_management_system_project_report_in_java.pdfIn PDF document text
    • https://721ea522-a1f6-4523-903e-24b3c8014629.filesusr.com/ugd/5a834c_c7b2c8a6a1384f70b3929c6d640b421c.pdf?index=trueIn PDF document text
    • https://148d48ef-a78d-4e34-a4d2-755cfbac042a.filesusr.com/ugd/ccca9b_718d1a86650a42659c578838b82d4d10.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_off0000e1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A2 5492 bytes
SHA-256: 1e3fd5b25bdfcfdc14d0c60e260b16b3883f6893dd59a469f4df40b5e30df848
font_01_sfnt_off0000f45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45C 10876 bytes
SHA-256: 03bea98a2e5cf243d24c3344fe70c87fc52433899643a9b85e6b5d2b2f2905d6

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