Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2426baebcb6194a…

MALICIOUS

PDF

71.1 KB Created: 2021-09-26 02:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a82ee93e43d4424a7671707d0b0e3317 SHA-1: 74cb99194e4663a7d4ec6140c76937644546e3e8 SHA-256: d2426baebcb6194a558886febd18cf266e74f09515cc2ea0c65c7bc5faf59e75
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, and a heuristic identified it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/setuzonasonurulikaso.pdf In PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/xijixamisaboranawu.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/59404596720.pdfIn PDF document text
    • http://mirsistem.com/depo/sayfaresim/file/11388791936.pdfIn PDF document text
    • http://badgerhillfarm.uk/86169484279.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ba02b0f8d---58515234783.pdfIn PDF document text
    • http://ncteonline.com/userfiles/file/95093317210.pdfIn PDF document text
    • http://basketaci.cz/UserFiles/File/89596810127.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/zunozotikul.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/jeguzunotifiwibaji.pdfIn PDF document text
    • http://studio70.eu/userfiles/files/fojisetomizif.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/ralakafogixoxojibufun.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/14235069802.pdfIn PDF document text
    • http://ver9ctrl.sonikgps.com/ckfinder/userfiles/files/besopibugovu.pdfIn PDF document text
    • http://iucecb.com/files/file/buzinisubusufozet.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/piwaxitatojidonemegome.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021091514455036.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/bagol.pdfIn PDF document text
    • https://datajournonepal.org/files/xewemuwozomoxunawip.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/75867021052.pdfIn PDF document text
    • https://tonmathunglan.vn/upload/files/xugemimobigozaxopasat.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/xeloxo.pdfIn PDF document text
    • http://czyxchem.com/upload/files/futegubujofukeli.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/30237607876.pdfIn PDF document text
    • http://www.egymast-segito.hu/uploaded/fck/file/35881634683.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/lamafubepogojad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=sport+tv+apkPDF 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_off0000b30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB30B 9936 bytes
SHA-256: 25bcf8e2a34186ff36790e6bc485338628a66a007e5687d038e934be50552dd3
font_01_sfnt_off0000c930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC930 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE142 17548 bytes
SHA-256: e90451d230adf3606796909247f633f31d78bb9027975dcf9291888e04873a5e

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