Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad950c6b729d80d…

MALICIOUS

PDF

68.0 KB Created: 2021-09-19 09:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 77eb767054e9dd5be35e6fee9e096d87 SHA-1: b0eb00b43f05121db479e61d6aa309831a5bd56a SHA-256: 5ad950c6b729d80d83d5edbf564d3d67693439c13704fa9bba8cd2a404e58340
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_IMAGE_LURE' indicates it's an image-only document designed to trick users into clicking a link, typical of phishing campaigns. The embedded JavaScript likely facilitates the malicious action, such as downloading a secondary payload or redirecting to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 67 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://donghotam.com/luutru/files/87637889040.pdf In PDF document text
    • http://esipro.lu/userfiles/file/fotevowewosuparagi.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/wakumipo.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/lamujifosavidibik.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/b48a7843514859c7080fe0a994acb6a3/47795748962.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/vokedulonef.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/16913512294.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/46370851647.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/vopukokodenixu.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/muwujovaluwubesese.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/dogufekemiwuk.pdfIn PDF document text
    • https://geloracinta.com/contents/files/35882723221.pdfIn PDF document text
    • http://metzlerranch.com/userimages/70719746078.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/wexufudesafikawejupo.pdfIn PDF document text
    • http://webs123.com/userfiles/file/7342673883.pdfIn PDF document text
    • https://profesa.net/userFilesfile/fubapupoxanebur.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/gejazumus.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/vuterenewigelowimud.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/zevutukanu.pdfIn PDF document text
    • http://votava2.altrodesign.eu/ckfinder/userfiles/files/64737583431.pdfIn PDF document text
    • https://ayurmitra.com/files/file/32064765086.pdfIn PDF document text
    • http://ageddfjtj.pretty-match.com/upload/files/6337883136.pdfIn PDF document text
    • http://phunggia.biz/userfiles/file/xixebitetipoxiz.pdfIn PDF document text
    • http://epicridesnepal.com/files/lapotisovowaduri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=candy+crush+download+androidPDF 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_off0000af43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF43 14172 bytes
SHA-256: 615c15b647c0778c035caa217892954e84a89512410de23da5a7502b89fe4f08
font_01_sfnt_off0000d26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA81 10568 bytes
SHA-256: 32d91a38122af9e192b241c7224604acc5cc06b28f089da33c225cb33c25ee5c