Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aaa76a9538bdb56…

MALICIOUS

PDF

80.8 KB Created: 2021-03-23 23:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 283783f419916f772572456dddf032a6 SHA-1: 2e7088ad52d4509013022f12701a85e6f32cca7a SHA-256: 3aaa76a9538bdb56a21a8e8376b1ebe63a3fc883523f527df7c679f8919bd91f
126 Risk Score

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 0.9990

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://botokaw.ru/wix?keyword=four+paws+up+bakery PDF link annotation
    • http://usersdeviceprotectionservice.site/king_lear_themes_powerpointhb01m.pdfIn PDF document text
    • http://betmoy54.com/jizafiledazapomixozoaw0hz.pdfIn PDF document text
    • http://febisulel.22web.org/51146361565.pdfIn PDF document text
    • http://wawesoja.sportsontheweb.net/44787316162.pdfIn PDF document text
    • http://zatoxuvisovapuf.sportsontheweb.net/yamaha_ef1000is_generator_for_sale.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/fogifijujotemibubutaxev.pdfIn PDF document text
    • http://instacopyrightcenter.com/26143541961qo4q4.pdfIn PDF document text
    • http://zijixiteluwek.scienceontheweb.net/my_fathers_dragon_movie_in_english.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/anisomeles_malabarica.pdfIn PDF document text
    • http://gnoogle.site/multiplying_and_dividing_radicals_wo8y23e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_9657cea7710c494187ebb80be3c51965.pdf?index=trueIn PDF document text
    • https://94ac7338-8c66-48ed-b7e4-01cccba3eff0.filesusr.com/ugd/9b8421_d1681057b312467a83a5124242f4dea5.pdf?index=trueIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_5afdbf688542470b91107e1aa70c4f49.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/36267822225.pdfIn PDF document text
    • http://vavazewesepato.epizy.com/72031335102.pdfIn PDF document text
    • http://lamuzanumezaw.rf.gd/cheetah_vs_springbok_video.pdfIn PDF document text
    • http://vopuxoke.epizy.com/zojorufazesurosojojaxok.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/sisedadilixuporusejuz.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/jandy_laars_lite_2_pool_heater_manual.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_f4d2115606ea4dfc92e1bdebb84a5bf8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lofese/25158912799.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/bhatti_vikramarka_telugu_full_movie.pdfIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_9bbb83b182af433caf51ad1ea6b00430.pdf?index=trueIn PDF document text
    • http://jedigox.epizy.com/ansys_mechanical_tutorial_guide.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_off0000f188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 4784 bytes
SHA-256: 57e8447892bea37a897b141e2994525863d17736178b67e514d44e0cdbbb8fb4
font_01_sfnt_off000101f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F0 11064 bytes
SHA-256: 5eef8de7d6e9ed45fd1d78e50f37b0fbdee6dffbd8d313491745f9c2908cb059
font_02_sfnt_off000127b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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