Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9b855f4a38005f…

MALICIOUS

PDF

76.4 KB Created: 2021-02-27 22:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f4e5c2adbbd7b45094c8aa2055a37bd SHA-1: b3cbfb884b45e0573a944d5d5116fbc9994e3479 SHA-256: 8c9b855f4a38005f4e94df7ed85b216dc8ddde0001806015d0115fe9e8e046ff
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that mimics a product review, a common lure for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect the user to malicious content hosted on external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/123?utm_term=tp+link+tl+sg1005d+v8+0+switch+-+5+port+review
    • http://rugegav.mywebcommunity.org/telugu_books_free_download_websites.pdf
    • http://tamekawarol.66ghz.com/kejalok.pdf
    • http://desokore.medianewsonline.com/mamiya_rb67_professional_s_digital_back.pdf
    • https://cdn.sqhk.co/wularumijif/bhcgeij/55025162006.pdf
    • https://cdn.sqhk.co/gagufatemo/EGUihgf/skater_xl_maps_xbox.pdf
    • http://jekeluxuto.mywebcommunity.org/2010_camaro_ss_for_sale_los_angeles.pdf
    • http://skywonder.space/dinadivulonuvegevenescj03.pdf
    • https://cdn.sqhk.co/rogenujudita/J33jjjh/jungle_marble_blast_game.pdf
    • http://manamuposa.getenjoyment.net/72417923743.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/futamo/stanford_biomedical_informatics_online.pdf
    • https://s3.amazonaws.com/zufojadibi/border_design_black_and_white_free.pdf
    • http://kivozusemu.atwebpages.com/5305649355.pdf
    • http://sipanokule.onlinewebshop.net/celestron_astromaster_114eq_how_to_use.pdf
    • http://tamegebodow.epizy.com/jifixoz.pdf
    • http://rizivubonulej.atwebpages.com/larami.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/school_admission_form_sample.pdf
    • https://s3.amazonaws.com/ronenitevodo/63477159346.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e926.bin
e92424db2f60c3f9208d5a50c2b2713654a38693eca6cd5a10fb205e2011c9a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE926 5836 bytes
font_01_sfnt_off0000fd2c.bin
b3fbb45c61b7689a1b6e4091b3ad5a22e1a4c4469fbe12f1c3da1ff9d7dcfd0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2C 11380 bytes

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