Malicious PDF — malware analysis report

Static analysis result for SHA-256 19adb4951f0da5b8…

MALICIOUS

PDF

79.9 KB Created: 2021-09-17 04:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 5781f741302c67df004ed91249387ede SHA-1: 8ea6b305b431e4f18387fe9406f51783d03f2d81 SHA-256: 19adb4951f0da5b88b37012153b272e46060ae9cc33c4f2f48e03cc41703497f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://patanamachine.com/imgUpload/files/47208678506.pdf In PDF document text
    • https://kp-bs.ru/upload/files/64174056372.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/6460035533.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/71559743700.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34905712875.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/kuradideziximu.pdfIn PDF document text
    • http://thewesternmist.com/userfiles/file/46558413710.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/jagukimezebeniruzal.pdfIn PDF document text
    • http://ncteonline.com/userfiles/file/3421352004.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/nuvenevukuvigigeteroxus.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/vulewanegiwelegod.pdfIn PDF document text
    • http://faptvmedia.com/userfiles/file/xikemananelerabilobelodin.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210914170954_s3y5m5.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/jegamipun.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/38431987657.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/vodogawofos.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/sonefuwufamu.pdfIn PDF document text
    • http://idcla.net/upload/files/89021422654.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/8f9a2939ef8bf6344ec87fb7ec05e545/19936202736.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/gujete.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/74583308054.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/betenubog.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/daluk.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161347b4c5ed0a---jurevanodafapipupalen.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/jobadafogom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=avengers+game+initiativePDF 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_off0000d4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F7 17768 bytes
SHA-256: b30d25847c56e9515786024e97d02df114d3fd5904d0e35cec27a1352de2405d
font_01_sfnt_off000102d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D6 10332 bytes
SHA-256: 4d33903baedb2b860e53ebd88a259861f3b64992833192f63917e671bb74b510
font_02_sfnt_off00011a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1