Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e01f4ec98e48dab…

MALICIOUS

PDF

83.1 KB Created: 2021-09-18 19:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d09682ffab3bbc1e2565238a48f8d0b0 SHA-1: cdf936a3e7f421580316102de15b710b2c8257b7 SHA-256: 7e01f4ec98e48dab391200810e41e76ef1e2f8a777ec0831d6c0181a369627a0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of a visual download button lure further supports a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ketchas.ru/uplcv?utm_term=download+fate+of+alakada+full+movie+mp4 PDF link annotation
    • http://hsi-international.com/ckfinder/userfiles/files/95073776961.pdfIn PDF document text
    • http://forepic.com/_UploadFile/Images/file/wuzetowefepotogusum.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/ed89f5688f80695d1701435fb464293d/xamudezumulexidat.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/wusiditilujapim.pdfIn PDF document text
    • http://besttailor.info/ckfinder/userfiles/files/wagoxir.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/3832857763.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/gokupax.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/161425bbc2102d---61243233333.pdfIn PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210907_0BF997514323E8A5.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/46957036847.pdfIn PDF document text
    • http://synergienetwork.net/userfiles/file/wekutenal.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16145243ba8882---xegejoki.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/eaccd2d26cf10d952e726d5560817d44/94244867065.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/kirufileririludajawapadi.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/zorodat.pdfIn PDF document text
    • http://fk-fudosan.1nino3.com/app/webroot/img/userfiles/files/43285474911.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/tuworizezajoriwivi.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/64295370057.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/61644187951.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/96844135695.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139f1cea27b0---tolewuxepukumaresulepoz.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/6699340636.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16141c7978fa70---85327659102.pdfIn PDF document text
    • https://alternativecarrepair.nl/userfiles/file/domavegabige.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/25908871220.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16138b9ef7a0e9---xuwuwama.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/95986179485.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_off0000daae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAE 19160 bytes
SHA-256: e08d6cda0562b2417dd8a340fe7df8baa36b79c1153d120affc83a088c9efda4
font_01_sfnt_off00010cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD6 10812 bytes
SHA-256: 01847d4141607f99291729519b31c5aa0e1711ed426218667196b8c49f1f1b8d
font_02_sfnt_off000125d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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