Malicious PDF — malware analysis report

Static analysis result for SHA-256 449b348d5af23926…

MALICIOUS

PDF

92.9 KB Created: 2021-08-17 11:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2a96a99a95493e306f84116b08b84a38 SHA-1: b44d81bbb667c833b351f3a5060e50cc5a36cef0 SHA-256: 449b348d5af23926edba8403b6e2d2dd0c071cb28ef37084c22782ef9220cc12
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic strongly suggests the document is designed to trick users into installing malicious software by posing as a necessary browser update or extension. The presence of numerous links to PDF files hosted on compromised websites further supports this social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/aceaa0f0bdd7c900ab500c07fc283ac6/josuzokijuleminerop.pdf In PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/368cfb065127a830c96833c8fdd32dbc/96174550843.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16077aff88581d---59862359828.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b61687600---99039182274.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/nc3v9hgjue79b62h8a3s6uf26f/nabuvobilutuwa.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/vodonixagifanumu.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9fe7c2a3b7---32629674746.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/sixinopi.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087202be153f---71013582568.pdfIn PDF document text
    • http://tdvvietnam.vn/webroot/img/files/voxonikerugimuxido.pdfIn PDF document text
    • http://yalciniskele.com/imgup/file/nomumutabukege.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/2icpg9277t9r2gsdrc1p9rj6gk/73141923988.pdfIn PDF document text
    • http://memphiscentral1969.com/clients/865565/File/120040387.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/63375957821.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e7d520c2d---23195574059.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a69a90777e1---56333090594.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/31dedf856abfc708e80d2d1a9c6ca4f8/bozomazisexinasogijirubo.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/22734383863.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/abqn9n3jghpkupr0vtg8d1qho4/24764335468.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/dewesamefigefep.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a0aca7fc6---86604057084.pdfIn PDF document text
    • http://teknis.it/userfiles/files/52644007563.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/zuzotazewa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+block+hulu+ads+on+rokuPDF 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_off000106c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C9 10652 bytes
SHA-256: 3395b85bcbe5744cdc188ffec7dd5662cc64b859f55142547fd29e74f28b3282
font_01_sfnt_off00011f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F29 17496 bytes
SHA-256: fc982beb4334d3af69c4034e49acbab6eb3d872056786d6a7a45f30525b9a3e2
font_02_sfnt_off00014ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.