Malicious PDF — malware analysis report

Static analysis result for SHA-256 782308cfb52ee4e0…

MALICIOUS

PDF

68.9 KB Created: 2021-10-03 22:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d6149da297f366016aaff1fc0fd8dfce SHA-1: 6656dd8a89f60c1b8325551cdda033332981c9de SHA-256: 782308cfb52ee4e0b8cc18a78744f704b3f6aeb4f91e6bd6d1b4dc1f13cf7a71
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, including being image-heavy with a clickable action trigger and containing numerous external links. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of many disposable links on potentially compromised or disposable hosting suggests an attempt to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 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://archism.ru/uplcv?utm_term=convert+obj+to+dxf PDF link annotation
    • https://webmakler.org/userfiles/file/85503695274.pdfIn PDF document text
    • http://homeloanz.net/images/e/file/xuxixolu.pdfIn PDF document text
    • http://getwealthythisyear.com/ckfinder/userfiles/files/13239832649.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/59465743772.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/6942104347.pdfIn PDF document text
    • https://jazykovytabor.topenglish.sk/app/webroot/gallery/files/zufekowepinufa.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/zazibejinabuwib.pdfIn PDF document text
    • https://guadix.co/ckfinder/userfiles/files/59510311478.pdfIn PDF document text
    • https://mahae.hu/files/files/kazawilefirewudexagininuk.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/161469850698ef---kejuwoxozafekapomuza.pdfIn PDF document text
    • http://goodmax.ru/i/files/79945557452.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/46648900127.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/23015821097.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/74863255985.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/memaminagisogup.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161459efc62681---fedapefidewedimafe.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1614cf8e1a6327---63069694255.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/xutularukufovagonowirip.pdfIn PDF document text
    • https://oxfordjsr.com/userfiles/file/belulatemaw.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/93598802898.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/nuloxolivad.pdfIn PDF document text
    • https://lsv-wittlage.de/ckfinder/userfiles/files/sedegaririkij.pdfIn PDF document text
    • http://xn--12cxa2boh7cd6g7anex5omh.com/ckfinder/images/files/ziriwekapotidi.pdfIn PDF document text
    • http://yanartekstil.com/firma/files/94025514844.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109191116101270.pdfIn PDF document text
    • 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_off0000b22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB22F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA41 14352 bytes
SHA-256: 01ff17d8eda51c2d9ec65d65fc7e3a0f454a470de8f989893add08f9b821e9cf
font_02_sfnt_off0000ee24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE24 10348 bytes
SHA-256: c4d31b336231ad8df71de3f734b26fa792a89ad3a1027060307798d86d894bd0