Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6211b2e729249c7…

MALICIOUS

PDF

70.3 KB Created: 2021-10-01 11:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 535f91228a00bd052e940f4f1677adef SHA-1: d008477683d2f55672ddeb276593a5603967577d SHA-256: e6211b2e729249c79b43680d9eb06fbcd69ff230b4f5de24993a8e399579603b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to potentially malicious content, masquerading as movie downloads. Heuristics indicate the presence of compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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
  • 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.
  • 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://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/b3tl8kkqjc9vsobdc4724e4r78/14444535918.pdf In PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/61730328367.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/70058503721.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/wolage.pdfIn PDF document text
    • https://5udua.com/contents/files/lokapewibojudu.pdfIn PDF document text
    • https://zniczekowalczyk.com/user_images/file/zuxolibunadunelixosuwob.pdfIn PDF document text
    • http://trieuduong.com/images/Download/21323204628.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/kurapaxivoxaposexi.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613988fe94352---mutonaluragevedul.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/iiqt94l3fub6t9on772voi23i0/16457340786.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/21614860641.pdfIn PDF document text
    • http://tfforming.ru/d/files/xegebiwixitukejakez.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/49145062075.pdfIn PDF document text
    • http://badgerhillfarm.uk/rofekopofosivo.pdfIn PDF document text
    • https://defi128.phpascal.com/userfiles/files/kurokalupojifiw.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/tuvilejepolopodedivesan.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/45215047662.pdfIn PDF document text
    • http://sooclose.eu/upload/File/mokefulefisujud.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/f57a1ad3c39d7fda82fbb1da195b91fe/70731261921.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/38480174989.pdfIn PDF document text
    • http://haliburtonhighlandsheritage.ca/userfiles/file/sikakipuka.pdfIn PDF document text
    • https://roundtable106trust.org/admin/uploads/file/zowidamowik.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/6f4507f415e43a96023e25a84bdc5c4a/nufad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=sivaji+the+boss+tamil+movie+download+400mbPDF 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_off0000aece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAECE 16688 bytes
SHA-256: b00a287cc8b725871b21310994962d2656d772c21099c84416ee5222b8cd6dd7
font_01_sfnt_off0000d83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF054 11112 bytes
SHA-256: e8da5195367d07cd8e105e60f302cf5739b3251182999ea2957b60899040daaa