Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2dd0cb754407f8f…

MALICIOUS

PDF

97.5 KB Created: 2021-09-21 07:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: afd2fea4a535d506e9cc11bfa2892096 SHA-1: c39bb4c6e47f516a7e1a6aa4b549103c6b4685a7 SHA-256: f2dd0cb754407f8fc124ff24265218a786f02e6e411fc97ba1978b44f63c27c3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. This script likely redirects the user to external URLs, as evidenced by the numerous suspicious links found in the document, some of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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 https://wastran.ru/uplcv?utm_term=friends+season+5+fmovies PDF link annotation
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e98e295cb6---rutanapakobevapowu.pdfIn PDF document text
    • http://bluebossa.pl/files/file/guvepega.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/xabamitusatovoliluwo.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/gto1rmgtqrptcogicpk0ipkdi6/fubigarika.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/55249569716.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/58437055434.pdfIn PDF document text
    • http://hibertek.com/image/files/20210906_111715.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/89345395410.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/92195233696.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210913_053229.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210915_471A25612C7515F4.pdfIn PDF document text
    • http://w3-japan.com/js/upload/files/xowofunalupe.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/zazevutekumibinofelapop.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/54031425365.pdfIn PDF document text
    • http://cssh.es/img/file/98262768952.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/dogurivariwom.pdfIn PDF document text
    • http://ipllaser.in/uploads/66711988035.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/xusovifokexubarozupo.pdfIn PDF document text
    • http://effekt-film.de/files/file/92673693189.pdfIn PDF document text
    • http://dsagco.com/Upload/file/11392343621.pdfIn PDF document text
    • http://divyabodhanam.org/userfiles/file/senerivosotun.pdfIn PDF document text
    • https://huanghecables.com/d/files/20645443617.pdfIn PDF document text
    • http://haphadoor.com/upload/files/safobokuvaje.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_off00011979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11979 10548 bytes
SHA-256: 561c8fa227529e2800564150057bad07ebe343682a3cba566ea10532d741e851
font_01_sfnt_off00013187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13187 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14999 18392 bytes
SHA-256: e00c20532e1e9f12472aab893b2bdbb37c152f08e0121df9a38b4b73deb3f0a5

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