Malicious PDF — malware analysis report

Static analysis result for SHA-256 03489d4081e77872…

MALICIOUS

PDF

82.3 KB Created: 2021-04-03 03:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 45c3ef3eb670bfb7f3d8f93667ad9272 SHA-1: 577972a67a1e10deea8192d19442240a5b40baa2 SHA-256: 03489d4081e778725f063ce938dc6eaf5042d3db3aff5620de07672d0acfb0c9
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 0.9967

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://lozipotod.ru/award?keyword=ielts+vocabulary+pdf+magoosh PDF link annotation
    • http://navevukosuso.mypressonline.com/capresso_coffee_grinder_setting_for_french_press.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/tunekojigosowexod.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/vizatilozixokobusa.pdfIn PDF document text
    • http://kogemotuju.getenjoyment.net/pdf_to_word_converter_offline_installer_free_download.pdfIn PDF document text
    • http://jefijunanupe.sportsontheweb.net/75811979241.pdfIn PDF document text
    • https://cdn.sqhk.co/temazajilib/jxjhian/2398569949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5fdc3ef01ca8d.pdfIn PDF document text
    • https://cdn.sqhk.co/wevamerazo/bUcvjdr/4360310766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_60222120749ca.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/zigaketasitafutus.pdfIn PDF document text
    • http://dilawiputonu.mypressonline.com/pubox.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/gghcbOb/72231970569.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424689/normal_5ff6553253459.pdfIn PDF document text
    • http://burivuvuju.medianewsonline.com/63062195647.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/i9rzidf/54812710005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_6065e21937f29.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/collins_english_grammar_and_composition_class_8_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/0oigmIT/tunajaropa.pdfIn PDF document text
    • http://zukirudon.mypressonline.com/bimuzuzupifaxowobizuz.pdfIn PDF document text
    • http://zolepop.mypressonline.com/wugasorejakaxonosepobux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_a1b662edb860462fb4ec7e4ba4207f4c.pdf?index=trueIn PDF document text
    • https://c02a3fa2-970f-4384-b4fa-7a60184a1b73.filesusr.com/ugd/1da3fe_910929107a19419baa6bc147090dd5e6.pdf?index=trueIn PDF document text
    • http://gonegexunu.myartsonline.com/elevadores_de_cangilones.pdfIn PDF document text
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_072c1fadb3f8423d9137796c3b0a400a.pdf?index=trueIn PDF document text
    • https://4c8e72c6-e2e3-4108-adc6-102de481692d.filesusr.com/ugd/f4b4ca_7caedfb860ed4e45827b15222c73f3da.pdf?index=trueIn PDF document text
    • http://madigekole.onlinewebshop.net/metallica_back_to_the_front_download.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_off00010259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10259 5808 bytes
SHA-256: 853c95ba833760b219a277922a672a12a66dbc8f5eda04e18420ef0562f931a7
font_01_sfnt_off00011601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11601 11116 bytes
SHA-256: 35d88d29ed59cb7e20b696aa491438e461bc7748727ac39d7918e31d64e83ffe

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