Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24b48b00631d61f…

MALICIOUS

PDF

76.3 KB Created: 2021-09-20 02:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: de4eddf114521dc0bff85e2c68e56d12 SHA-1: 09710f66f6f512f67b1ce3f0e0d5fccef66f94e1 SHA-256: f24b48b00631d61f0e4b2e75bd1a2e5fc8e65201f7a7b4ab1d2c127d179619b4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to T1059.007, and the nature of the file suggests it was delivered as an attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://infrive.ru/uplcv?utm_term=xbox+live+generator PDF link annotation
    • https://daulte.ch/ckfinder/userfiles/files/52395733674.pdfIn PDF document text
    • https://sergiomauri.com/images/file/giwat.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/93647764026.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/figapupilafojumiw.pdfIn PDF document text
    • https://tuinvandecruys.be/file/jaduvonuzaxiwaxaket.pdfIn PDF document text
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1631555494.pdfIn PDF document text
    • http://abworder.com/uploads/files/pidep.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/giwipuwowajoneruzovexu.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/94669650988.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/gexevajilizijetidof.pdfIn PDF document text
    • http://gensugroup.com/upload/files/rukikogatutem.pdfIn PDF document text
    • https://path.mn/userfiles/files/94664452716.pdfIn PDF document text
    • http://addisonplaza.abwingsmd.com/uploads/files/godifiredeke.pdfIn PDF document text
    • http://test-immo.com/file/33521352643.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/12394403804.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/lalogotigesajisadas.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/59481423955.pdfIn PDF document text
    • http://sjanzee.nl/file/jojolumutetuwilifaj.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/10093063347.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161382efca392b---kuvugagagoxezugisififik.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/retorepixa.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/wudopavezuzajanibaviter.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/nabinavadimutavajixuv.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_off0000c6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D4 10428 bytes
SHA-256: 1f41c8a47bdd18cf6bb555a6917b9135666cd9da7c6c324b77877af4ddd70fdd
font_01_sfnt_off0000de8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8E 17748 bytes
SHA-256: 5f7c60e63ac62dab2bbc2fc6d390054a83c608866a6fdd022837e8e76d2186d1
font_02_sfnt_off00010bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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