Malicious PDF — malware analysis report

Static analysis result for SHA-256 9280a61fa8a6f4a1…

MALICIOUS

PDF

73.3 KB Created: 2021-03-28 09:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6f08e50e683ea623b6ce2e89161b3fc9 SHA-1: 1f2a4a81411a70489e38ba8cf3190ef3a6263347 SHA-256: 9280a61fa8a6f4a12663dc431c5b2009291e0b468ec4965d0856c009c31ff74a
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 0.9998

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://xajibur.ru/123?utm_term=watercolor+google+slides+template PDF link annotation
    • http://blablablacar.online/the_language_of_composition_3rd_edition_teachers_editionkmpw5.pdfIn PDF document text
    • http://fastgetme.online/rodasozaxonl82pa.pdfIn PDF document text
    • http://refoxedij.iblogger.org/lester_36_volt_battery_charger_parts.pdfIn PDF document text
    • http://reduslim-europa.site/21897028024vwloe.pdfIn PDF document text
    • https://cdn.sqhk.co/daxutoxod/hbMmhgi/managing_technological_innovation.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/ijghgji/saddam_hussein_wife.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/aheqLBT/16160521454.pdfIn PDF document text
    • https://cdn.sqhk.co/jagakutojut/gg6Noig/ruwizofiwogerodijesa.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/138548df-ebb8-4329-8dd5-b6e36a633229/90670095508.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_52328d1666d244d1a818f437c76e761f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sizabo/whiter_shade_of_pale_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad0041c5-38f7-4763-af64-522d1c96d56e/security_analysis_book_vs_intelligent_investor.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/how_to_factory_reset_comcast_xr2_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22a8365-4cc7-49b5-82ff-1fb1017d9443/13024715010.pdfIn PDF document text
    • http://junusesofuxog.rf.gd/everfi_ignition_module_7_answers.pdfIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_105f15e64372441baedaae762a1d79cc.pdf?index=trueIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_27f3ac50943e41f2854da0a57554d3ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizup/71279753337.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/astro_boy_movie_in_tamilyogi.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_off0000e111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE111 5404 bytes
SHA-256: 1e19a36934206af9879c5e413bb3cbf3f03d2e1a0ed859723fea204db047215b
font_01_sfnt_off0000f367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF367 10516 bytes
SHA-256: 70f58084dc190d9c143a452ede4421344774712905c9560733edc4773ec7b9bd

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