Malicious PDF — malware analysis report

Static analysis result for SHA-256 6865969db8a32412…

MALICIOUS

PDF

78.4 KB Created: 2021-04-02 01:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ce560c753b3785d41a62bd250590da27 SHA-1: 8cbcb2fb86ddd96b544865349c03cd496e4ab6ed SHA-256: 6865969db8a324122aef40c357ceecd4424ad1f06fd8dc738d5beb1eb5c919ee
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 0.9992

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://nipisod.ru/123?utm_term=barbados+passport+application+form+for+adults PDF link annotation
    • http://gobigs.space/71443861711lkmxc.pdfIn PDF document text
    • http://naturfresh.space/bob_evans_breakfast_sausage_links_nutrition_informationf8wii.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/why_riba_is_not_haram.pdfIn PDF document text
    • http://senteber.site/kasewazukubajithk9i.pdfIn PDF document text
    • http://priz24.site/34515318069daai7.pdfIn PDF document text
    • http://okrasote.info/94992561955ijq7t.pdfIn PDF document text
    • http://kusafomidufe.mywebcommunity.org/11573390592.pdfIn PDF document text
    • http://citimart.online/roots_alex_haley_in_tamilbhwvp.pdfIn PDF document text
    • http://artdebug.site/cubo_magico_formulaswe3r7.pdfIn PDF document text
    • http://supusatode.sportsontheweb.net/88483175987.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/c0699c29-9565-4cd7-b685-f0b6420575d8/probability_and_statistics_textbook_jntua.pdfIn PDF document text
    • http://gugamofizuxeg.epizy.com/afterburn_sylvia_day_espaol.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/56079993745.pdfIn PDF document text
    • http://pitigapevede.onlinewebshop.net/40485885884.pdfIn PDF document text
    • http://xosapexotakub.rf.gd/rikigevizanowegepuritoko.pdfIn PDF document text
    • https://5f142ba1-77eb-4a59-a0f6-793b2680e458.filesusr.com/ugd/8b97dd_179ecde7398142afb2dcc8b0945b1703.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0312baa2-917a-48b6-8268-8085c5bad1a8/6369473628.pdfIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_22ff47e810c94563ab75e88bbd307c34.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8fb858-d349-4d69-8965-32bc7bc124b6/80580516307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36264821-c8f4-4716-85de-317673bbfd1a/5870365588.pdfIn PDF document text
    • https://4e4608fd-868e-43f5-b6ba-14e5e4b50785.filesusr.com/ugd/b1f235_a68cb252ed364076b8ae8d684872e855.pdf?index=trueIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_474c42b7e99346f3b7a252a79f081563.pdf?index=trueIn PDF document text
    • http://nekezoxugi.rf.gd/sheet_music_printable_paper.pdfIn PDF document text
    • http://wamifuxifopaxu.epizy.com/71901182640.pdfIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_90bcd2ed806647e1ad9bbfbd888f4cdb.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_off0000f21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21F 5492 bytes
SHA-256: da51ce68868e22ba8c3110b7efde1f71b30f82e6433ee7e9638b5d57fb65cdd3
font_01_sfnt_off000104ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AE 11540 bytes
SHA-256: 8be21f612887f3e0b55bf1aee5ba3994686d3462c7338863008826e47f0d2c2e

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