Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ce4fff11b0bf79…

MALICIOUS

PDF

84.9 KB Created: 2021-09-09 15:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 62531ce41f13b9c7772438812e321371 SHA-1: d48335158e8f8ceb2efa6f5771b2041d664dc949 SHA-256: d6ce4fff11b0bf797dde0ffb4f08bd61b182759970d2c1cf007ba4d34b02ff87
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31195327371.pdf In PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161312f81b10e4---61733087736.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/bewake.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/72986283601.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/43863116912.pdfIn PDF document text
    • https://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/11904007495.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/suvavudimakigo.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/dezalotagolabog.pdfIn PDF document text
    • http://keramann.ru/uploads/files/fuboguxaxo.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/rigiluxegu.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/97684963287.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/72021659887.pdfIn PDF document text
    • http://progetec.org/userfiles/files/linufodisowiforukazirim.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/51475206166.pdfIn PDF document text
    • https://mayphoviet.com/media/ftp/file/2432991084.pdfIn PDF document text
    • http://khocabien.com/uploads/files/49312779785.pdfIn PDF document text
    • http://medrea.ru/upload/files/48371602299.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/56846683765.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/10613273936.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210907033400.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/vuper.pdfIn PDF document text
    • http://bluebossa.pl/files/file/defiguxezugajemugogikimit.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/imvq5qr7nchhciedaakurkn79e/zugagur.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/61426204251.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=let+go+and+let+god+movie+downloadPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEC 17816 bytes
SHA-256: 350f206d9c5639dc2b833a73731df072fa388cb9a0d2c3673f32ddc8881643ae
font_02_sfnt_off00012e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E40 10432 bytes
SHA-256: 8739901cc4d449b185305f1350aa8ff5ea476e9742b20046b4223256f12e03e5

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