Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96374bb00f84f90…

MALICIOUS

PDF

69.1 KB Created: 2021-09-26 01:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2c85fb88182371c880da908800a42845 SHA-1: 3e450b9a57b7ce3429a6bfa2934f2601ee1212e9 SHA-256: f96374bb00f84f90ecb78022b77dd6b23f5d2705203bbb5194f2107675d55dfd
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to malicious sites for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 6

  • 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 0 text block(s), carries a click-outward action, and is only 69 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://surupaceanu.ro/ckfinder/userfiles/files/wovepetepes.pdf In PDF document text
    • http://graficaeformazione.it/userfiles/file/50256193170.pdfIn PDF document text
    • http://webspace.mysdam.net/images/newsletter/files/79641265328.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/57331801240.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/wopodeduzovijumip.pdfIn PDF document text
    • http://kajo-frings.de/userfiles/file/bavevuwasavadofogag.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/bufivowowera.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/11948433904.pdfIn PDF document text
    • http://chafewyuok.handysociality.com/upload/files/57816992331.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/61917178229.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/33622084944.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/sovux.pdfIn PDF document text
    • http://ruihuitax.com/files/file/xuzezakefijimupepomuvejo.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/45137999106.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210914180554.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/3435759310.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/11231103633.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/39882387448.pdfIn PDF document text
    • http://hexindechem.com/upload/files/52371632209.pdfIn PDF document text
    • https://arenerachicamocha.sinecsas.com/ckfinder/userfiles/files/basuvuwisokelisu.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/gezejolufume.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/84233811483.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5db10ed50---40492500397.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/41646735040.pdfIn PDF document text
    • http://fjsxsx558.com/upload/files/22145163166.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/getid.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/22266642015.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=moto+rider+modPDF 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_off0000b53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB53A 9924 bytes
SHA-256: 2b077edb2b6b417f6aba632cf2939e3e9ea9b5faf3f2c8756f0385afd0b998f7
font_01_sfnt_off0000cb1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1D 14216 bytes
SHA-256: cd6d6b84eabc973bcc0e3c216d21271af20a33a3f6311aa4baced741a71eef1f
font_02_sfnt_off0000ee98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1