Malicious PDF — malware analysis report

Static analysis result for SHA-256 749066cb791868e0…

MALICIOUS

PDF

82.7 KB Created: 2021-08-22 01:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a3369981682c7eb5ffa50bd600ab4f1 SHA-1: 54d70b8e0df9be119fcd1071e4f0451fe6580c2f SHA-256: 749066cb791868e0549a69e331cc9c3029767c723e04672f94423452db9980ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to various websites, many of which are identified as compromised CMS uploads or disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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 http://www.beautyvogue.ch/Files/file/tobetudiw.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2d5fecd0d4---39812065982.pdf
    • http://calisnt.com/uploads/files/16893033804.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/e5f8ceb3075a278612f0aafbb4f588cb/dujubokavijobesiritutuz.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/1b36e091e6e4d13495ee3b5d81dc5fe3/52333830617.pdf
    • https://beautyyaurient.com/editor_upload/file/dukafajugomujulumatudi.pdf
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/14755589262.pdf
    • http://ues-rb.ru/themes/ues-rb.ru/files/vadalajasi.pdf
    • https://ivanda-commerce.hr/userfiles/file/lexewago.pdf
    • http://herfon-machinery.com/images/ckfinder/files/20210810222720.pdf
    • http://karimeh.com/public/userfiles/file/8603425137.pdf
    • http://5m-tti.com/uploads/image/files/94955278517.pdf
    • http://mim2010.ru/userfiles/file/fazubajekizu.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aeefe5a4bb---rudozelamolixogutat.pdf
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/zuvujowo.pdf
    • http://nacyc.jp/Upload/file/kisanafeketenam.pdf
    • http://siembra.me/uploads/files/gatuf.pdf
    • https://666666.vn/upload/fck/file/41757056299.pdf
    • https://f27szerviz.hu/upload/files/23999657450.pdf
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/dupetusopesitunaramuxewur.pdf
    • http://werder-ritter.de/UserFiles/File/paxexinibelifowu.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/39d5cce75178ac7ac56cdfafa14d995f/sepadu.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a986acf2ea8---bulivaxemawugaponanazojox.pdf
    • https://shop-ecobati.com/medias/upload/files/wutap.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a067e024087---matotefomixasu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=adobe+photoshop+tutorials+in+urdu+pdf+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e06c.bin
c4200e10272f113e5253a1042399b3a2e8a8dc600b2b2159607320399306bafd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE06C 16912 bytes
font_01_sfnt_off00010bb7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB7 16792 bytes
font_02_sfnt_off000123ce.bin
5f4de309eeb2bc708c2d87c899c2eff4aff8d72a02f146f9f1243848a4c00634
pdf-font-stream PDF embedded font (sfnt) at offset 0x123CE 10900 bytes