Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3c1da79642af83…

MALICIOUS

PDF

68.8 KB Created: 2021-09-27 07:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ec708da32b7c95b4f64613a04f4eec10 SHA-1: 6fbecfedf08072b1c5b94680d2769d87891fa3c8 SHA-256: 2e3c1da79642af836c9cef170b19164d3fd24591708e5bde74f722f4c34efd70
86 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical of phishing campaigns, with multiple embedded URLs pointing to potentially malicious content. The heuristic PDF_IMAGE_LURE strongly suggests a phishing or scam attempt by presenting a visual that requires user interaction to reveal the actual content or trigger a download. The presence of numerous external links, many on disposable domains, further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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://wroclawmodelshow.pl/ckfinder/userfiles/files/piximaxezoni.pdf In PDF document text
    • http://lorichphoto.com/pictures/file/buraxekipuxob.pdfIn PDF document text
    • https://vinniescustoms.com/userfiles/files/zamili.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/duzevuraso.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/detilagiti.pdfIn PDF document text
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/kobesinur.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/beres.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/161417efd2e8df---61817089063.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/rarezibotinapubexedak.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/ramokawujejokoma.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/21d91ed46002ccb80f1cf47c8f807061/81981948793.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/37988024019.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/41775394103.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/rilawadabuke.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/dujuvabewudabejug.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/87550153211.pdfIn PDF document text
    • https://mallarpurnaisuva.org/go/file/pewikalig.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/bugoxuxoj.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/99652517694.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/16929205055.pdfIn PDF document text
    • https://bike-accessories.supersites.gr/content/ckfinder/files/49809997219.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/62027161169.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/ligadepokonavitovogimur.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/13696519261.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=omnisphere+free+macPDF 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_off0000b1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1CF 14376 bytes
SHA-256: 1fe8af738bc0a9f3d9415b396c7d334c494f194ff970d5912f9c752be9944fed
font_01_sfnt_off0000d592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD592 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA9 10508 bytes
SHA-256: 051f3de6e427ed8937698066ba32b5565d715db09e25f08af85246160193e278