Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02ae0df580dc24e…

MALICIOUS

PDF

79.0 KB Created: 2021-09-18 07:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0f0ab919e151c8219a0b1977d890a2fb SHA-1: d05020ae21c6c4616429bdcd27d93bebdec2d8d9 SHA-256: b02ae0df580dc24ea514ec0a816c818baa9cfdaee7bc3e54d56ac8a5981ecd6c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://coretry.ru/uplcv?utm_term=madhura+raja+torrent PDF link annotation
    • http://x-site.by/upload/editor/files/metari.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/28250395876.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/12487284233.pdfIn PDF document text
    • http://abbaorphancare.org/survey/userfiles/files/27551153389.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366c9c56f8c---wejorefopo.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/82025917061.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/maruz.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/dubudonurej.pdfIn PDF document text
    • https://planningpvedh.nl/ckfinder/userfiles/files/80680019905.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/46797885772.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/30092312983.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/jaxinu.pdfIn PDF document text
    • http://bluebossa.pl/files/file/25679991398.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/73014829167.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/51975434393.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/77012475336.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/ravoziluwakizomedojeme.pdfIn PDF document text
    • http://lonniestireandauto.com/nbloom/fckuploads/file/57239849116.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/ragedilezanuzi.pdfIn PDF document text
    • http://pegastelco.com/pictures/files/54299376574.pdfIn PDF document text
    • https://tomas-music.com/contents/files/65973444975.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/532a768da3ff0b3871f9eac57becb474/78243200852.pdfIn PDF document text
    • http://darangyi.com/userData/board/file/26660661003.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/junal.pdfIn PDF document text
    • https://searches.onlineconvey.com/userfiles/file/11887831233.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/37602768839.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_off0000ccdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDD 10260 bytes
SHA-256: 744273878c1de6db06417dc055b027cc98ebbca3739a067d4c4ea7683847fc11
font_01_sfnt_off0000e3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D7 19604 bytes
SHA-256: 55d5b8bfba4b2034d849958616ebff54b8357374a8737fa215b6c7de24f6964d
font_02_sfnt_off00011637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11637 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1