Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ad42c7ebac8cdb…

MALICIOUS

PDF

68.0 KB Created: 2021-09-13 15:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2de782095bc71748440ab21b6a79573d SHA-1: 5bb3d47facc8ddf698acceb96eaf081f29f596f3 SHA-256: e8ad42c7ebac8cdb490583ccb5e1b07fb324342bd8386b8f172759226a2e21b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and numerous external URIs, suggesting an attempt to redirect the user to a malicious site. The PDF_IMAGE_LURE heuristic indicates a common tactic of using an image to hide a clickable element, likely leading to one of the extracted URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://risorsaterra.it/userfiles/files/xukuwirabavenazufob.pdf In PDF document text
    • https://sukaunited4d.vip/contents/files/wanidaraxi.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/gisasoduzuzifalade.pdfIn PDF document text
    • https://teater77.nl/userfiles/file/pogazeritinusijawiros.pdfIn PDF document text
    • http://ux02.wadhost.com/js/ckfinder/userfiles/files/73847651956.pdfIn PDF document text
    • https://peisheng.org/uploads/ckfiles/files/6138eb730a942.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/gizezinakekuline.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/nuzokurufe.pdfIn PDF document text
    • http://miyisz.com/mingyi/images/userfiles/file/67707111690.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/42687811170.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/95304866705.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/65689534067.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/kuzukem.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/70681449616.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/90169825461.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/javub.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/dizofogomakotaza.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/faratiz.pdfIn PDF document text
    • https://baglab.pl/galeria/file/47753769643.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323d604bcb8---topidime.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/farebuvovidegovarukawukel.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/89302092367.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-2/20210902020541566942.pdfIn PDF document text
    • http://surausa.com/uploads/files/walezuxujovuna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=picsart+full+free+mod+apk+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_off0000aeae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C5 11060 bytes
SHA-256: ac851825958c5e50f6b282e9344973a8c0dd935b53f67ce1f08d9ffc0e44b25c
font_02_sfnt_off0000e098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE098 13764 bytes
SHA-256: 3a4611a53716cdedd98c3d9082eac81f21320d8e10992d44b5103a8be27268af