Malicious PDF — malware analysis report

Static analysis result for SHA-256 0483e8bc36702ab8…

MALICIOUS

PDF

80.0 KB Created: 2021-09-12 16:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 920e7e589af13e40c1ad9a936860985c SHA-1: a7a729b5d7c241c3e985152ea7b8f909d7f144b6 SHA-256: 0483e8bc36702ab8dd7ea956d6819cc8832fa0a7fa5eb7d2a93d08bcc43e2c7d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or to download further malicious content. The presence of these links strongly suggests an intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://philabc.ru/uplcv?utm_term=boku+no+hero+season+5+ep+15 PDF link annotation
    • http://waycreon.net/bhaskar/yii/upload/files/xalufuginisumovomarogoze.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/22642202456.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139fb61df3c6---nuwurebavajoxokulufuxoba.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/zonadaxoxopekopire.pdfIn PDF document text
    • https://ms2gacor.com/contents/files/ruwexewomejatutevefutuv.pdfIn PDF document text
    • http://sov.tranovice.org/webpagebuilder/ckfinder/userfiles/files/64162232050.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/17033364711.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/49l508f2eo7a9f5fvjk2p3j539/52080424941.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/92578489407.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/kiziniresaligojuwepelowe.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/75402621299.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/51825209557.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/gabalixisesavenivifibeb.pdfIn PDF document text
    • http://kargo-box.com/uploads/files/23987176144.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/farakimeme.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/fumiporusajidewidutoboto.pdfIn PDF document text
    • http://guitarenko.fr/img/files/runedadozojijonunovi.pdfIn PDF document text
    • http://www.sushmitamukherjee.com/fckimages/file/jodorikudijuni.pdfIn PDF document text
    • https://12tiga.com/contents/files/gebiguzovixosilateduxo.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/52481189917.pdfIn PDF document text
    • http://eshop-kocicinadeje.cz/files/file/98620827457.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/gidanise.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/zimavovig.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_off0000c970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC970 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE182 21652 bytes
SHA-256: a0c37fdf59c02fc553fe9f375241e2e9c59866469d60b826533eed2ba545fa74
font_02_sfnt_off000119bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BF 10544 bytes
SHA-256: c5fffc53e2f5721ada78aabc98664fd68efc0b507123d2fbb5916aa35a9fc146

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