Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb48790f9463da58…

MALICIOUS

PDF

69.4 KB Created: 2021-10-04 01:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 6390a5ff87025e5fdb4e895e77be8d33 SHA-1: d1cb1f42c17ec61205062d2ca3afdd446546f5ad SHA-256: eb48790f9463da58135eb3785c5865fdb231e10e5d1854c6200fe00f4d9062da
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. The document contains numerous embedded URLs, many pointing to disposable domains, and exhibits characteristics of a link farm. This suggests the primary purpose is to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://labradory.pl/file/36001143302.pdf In PDF document text
    • http://verypool.cn/images/upload/File/xidamimexajoxexadatutadus.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/nubavexafitedewazaboripa.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/meduxesuti.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141b07179187---viwow.pdfIn PDF document text
    • https://umutfm.com/resimler/files/90326732385.pdfIn PDF document text
    • http://gamaxmotor.cz/data/dokumenty/begatorerejolimufevatat.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/30477727502.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/26120730506.pdfIn PDF document text
    • http://www.offshoreyachts.net/web_upload/editor/files/dusemuboposas.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/jasinuvalojakumijosedaf.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/remusinobaka.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/36875921316.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/35594848532.pdfIn PDF document text
    • http://oumkua.com/userfiles/file/kulafakakatiluxejubobume.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/lufovoja.pdfIn PDF document text
    • http://safarang.com/basefile/files/nedujefapu.pdfIn PDF document text
    • http://aeusjtu.pretty-match.com/upload/files/magaxawibojazorapanixevam.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a1a4e6e795---jezipetapodapenegeze.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/xubunizukoj.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/sililanozojarulu.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/26080514792.pdfIn PDF document text
    • https://ikomsolutions.com/admin/userfiles/file/fexoba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=kuttyweb+hd+video+songs+downloadPDF link annotation
    • 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_off0000af8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8D 15476 bytes
SHA-256: 8f8948db5b8e9350e81b7fb64e62c8130c1fe3e815378418d6a38d557b0e303c
font_01_sfnt_off0000d6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FF 10924 bytes
SHA-256: 4f89ffe949be2dc8ebf717801ed402d344bdc52abde0afa694c92af4d828b15a
font_02_sfnt_off0000f01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1