Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3be0002b72e25a3…

MALICIOUS

PDF

68.0 KB Created: 2021-09-25 02:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b6830615bffafbd054903dd833b8d03f SHA-1: 67018effcd8b80d6e241826d01a7815c9c715b85 SHA-256: d3be0002b72e25a3df9d15485863ba3f0091f2f229e8b5819fdeff64bc7636ce
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only document with an action trigger, typical of a phishing lure. It contains numerous external URIs, suggesting it's part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead the user to a malicious site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • 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 1 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://www.bevillelecomte.com/ckfinder/userfiles/files/gujoposinusomo.pdf In PDF document text
    • http://gotween.com/userfiles/file///38042102765.pdfIn PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/zunuwe.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/41259446415.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///97543899156.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/80171077861.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/53912061012.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/9197639662.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/jibeguwad.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/1632527045964.pdfIn PDF document text
    • http://kaus21.com/userData/board/file/85224656207.pdfIn PDF document text
    • http://nakloboucku.cz/uploaded/file/89405265279.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134d4a011bff---votononisobufibupenilana.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210914_762D36AB76CC77C0.pdfIn PDF document text
    • http://www.hkrns.org.hk/ckfinder/userfiles/files/95347071191.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/papebutu.pdfIn PDF document text
    • https://cukimentescukraszda.hu/files/files/limusikofudo.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/17829894016.pdfIn PDF document text
    • http://bcslaw.hu/admin/fck_upload/file/sotaxidi.pdfIn PDF document text
    • http://quesnelfoundation.ca/userfiles/file/monogitifajuzodobatizib.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210925779_834952878.pdfIn PDF document text
    • http://iscyber.com/userfiles/files/90019479866.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/5d5c2d90815e5e7effc5d5dfb4c2cd87/renugagoziwumaxamopovubi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=adding+mobdro+to+firestickPDF 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_off0000ae1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE1B 10824 bytes
SHA-256: 8d91ea11789d185cb1edc19d332b882de70a623c7dd983668772d7aa9d77e007
font_01_sfnt_off0000c6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000def4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF4 14332 bytes
SHA-256: 34728957a1be921eac262fc83dfdc2a6d1cec9264a0d719d94ff6b29f11434aa