Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5a04c3ee0151de…

MALICIOUS

PDF

89.7 KB Created: 2021-03-08 20:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c97e70f0676d160ff4959aa0fbd298ae SHA-1: 24e6859fc8106f6df83d6e5d7d81d3477e355b65 SHA-256: 6c5a04c3ee0151de477c3e58dfff10941669abef1fce79725f39d454888c0d78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with one prominent URL leading to a suspicious domain, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation or to host malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=akademia+pana+kleksa+ebook+pdf PDF link annotation
    • https://cdn.sqhk.co/nogawevorus/Aujfgfr/haircut_policy_in_school_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/jgicjgK/amc_24_hampton_va_movie_times.pdfIn PDF document text
    • http://wojisub.mypressonline.com/pioneer_avh-x4500bt_bluetooth_update.pdfIn PDF document text
    • https://cdn.sqhk.co/daviluzabidi/5hj6sgg/negur.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/Ahigj9N/study_initiation_visit_report.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/SidggvN/sceptre_tv_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/fjV5fgi/zabadaxixozopup.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/fjagiha/maze_run_3d_labyrinth_apk.pdfIn PDF document text
    • http://lapiwudoxavov.scienceontheweb.net/xofokumuwijiwikak.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://s3.amazonaws.com/tuxenipup/58571193548.pdfIn PDF document text
    • http://pizuzol.onlinewebshop.net/which_bible_is_used_in_catholic_mass.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/safurisumedibitavil.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_d1b6d7dce8ca41d3bb885d548cb38dd1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/vme_additional_information_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/ncert_maths_textbook_for_class_6_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/73547433156.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/aguinaldo_international_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/badminton_school_sixth_form.pdfIn PDF document text
    • https://fc060a1e-8c1d-4b7d-bafd-75f79d4c6355.filesusr.com/ugd/c0a468_d5cf4aa750564352ac4b73bf68da20cc.pdf?index=trueIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_22b976eb8560446cb5273cbb5ec7ff63.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jebokizez/kofisivejugusizarigipe.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_off000111a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A5 4992 bytes
SHA-256: c3b144d776117698ff2478aee74ba15711cfc234c5fd1572dded35329fc9c6e8
font_01_sfnt_off00012277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12277 12268 bytes
SHA-256: b77eaee212072e52f603d90447bd288c45343b6b7306c29e821427902bd363cf
font_02_sfnt_off000149da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149DA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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