Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2274baab58f6edf…

MALICIOUS

PDF

83.7 KB Created: 2021-09-19 05:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d83c1bba48d9a9ff978b1a66b51eec41 SHA-1: 81807b5b076298c7653b478e07178f175d60f9ba SHA-256: e2274baab58f6edf4b10e37b278cb75ccd2177df98540e117645e53914c5fb36
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://inwebjor.ru/uplcv?utm_term=suicide+squad+hell+to+pay+watch PDF link annotation
    • http://alliance-ic.ru/uploads/file/lefipefiju.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/gejagozebolidasolo.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16134ccc77b99c---93731749545.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/87049084650.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/wazolezulamivum.pdfIn PDF document text
    • http://xaydunganphubacninh.com/webroot/img/files/66082648797.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bimow.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/vivugilonom.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/laxodadejiwuz.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161433449dc1a3---zezuvoma.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/90431066684.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/suworipagogek.pdfIn PDF document text
    • http://prmakeup.com/Image/files/depapit.pdfIn PDF document text
    • http://xmzs.org/userfiles/file/wuwunur.pdfIn PDF document text
    • http://epilia.com/upload/FCKEditorfile/xebotetad.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/gitok.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/98414114513.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/bilukotuwibudowaf.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/30564290877.pdfIn PDF document text
    • https://actor-conseil.com/files/file/16743536581.pdfIn PDF document text
    • https://aneri12.cz/res/file/5684295080.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/91024273154.pdfIn PDF document text
    • http://irinabailey.com/upload/files/31949981610.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_off0000df0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0D 18656 bytes
SHA-256: a1e93903cbf16b74e1edcdb5c409cc286a1c5f116d14c50c39b039c874a50fc8
font_01_sfnt_off00010fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBA 10928 bytes
SHA-256: 61f87ae54c904a33e55539683872c5669db342e2afe01b7f1c2491eb15fd8dfb
font_02_sfnt_off0001290b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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