Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6c03c1675d2d4c…

MALICIOUS

PDF

75.6 KB Created: 2021-09-11 14:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 0a71d9ab27d294f1c6b26ca44533aca7 SHA-1: ad1449899a464fb7ad7fae67f392c9f31e9ed3ed SHA-256: fe6c03c1675d2d4c9c322fb95d0ec21c32397edc768c2b4e7aa914cad5e0030d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://laborke.ru/uplcv?utm_term=annabelle+2014+putlocker PDF link annotation
    • http://hanahana.vn/media/ftp/file/zekosen.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/79582605602.pdfIn PDF document text
    • https://scout-educationguide.com/userfiles/file/18194276012.pdfIn PDF document text
    • https://digicpictures.com/downloads/14408799454.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc85a9e4a0---kawabunasikizovijexi.pdfIn PDF document text
    • http://hladonural.ru/upload_picture/mojirazawage.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/86152899733.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/80214987609.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/36795427493.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/xijanitexiluzapisafogikib.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210904172312000.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/gagofetuwawapotuzirekibo.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/74191261321.pdfIn PDF document text
    • http://www.toptehnik.si/images/rewibefaneji.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/logetomubefe.pdfIn PDF document text
    • https://uslugiinzynierskie.eu/eurostyl/photos/file/41976196465.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/72839157921.pdfIn PDF document text
    • http://zuche0551.com/upload/file/jomeregorumujeko.pdfIn PDF document text
    • http://eko-uklid.com/files/file/12751662102.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16137079c16306---77196209116.pdfIn PDF document text
    • http://becucci.it/userfiles/files/maxizaxaburef.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/wirowukuduxuj.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/59477275466.pdfIn PDF document text
    • http://rtm-plus.ru/ckfinder/userfiles/files/gemokesikum.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://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_off0000bd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD91 19680 bytes
SHA-256: f4465fc4f9c00318b9820991d4ad9ad5f5e0904999a46cce3f10d426863657e3
font_01_sfnt_off0000efab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C2 10792 bytes
SHA-256: be5e0c7682070f454640634bd3bb16a967973dc3b0a32d6d50c3c08404cee076

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