Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc27cc4a843398b6…

MALICIOUS

PDF

91.8 KB Created: 2021-07-31 10:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9ed448d7277588bda7037f9043fa721e SHA-1: 21dde696fc5919fb400b32bb802fd5f4eeed25d8 SHA-256: fc27cc4a843398b698cdd88eb171a5005001e3241183d0a79114882165dc8dbf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly indicated maliciousness, and heuristics identified the PDF as a link farm pointing to compromised CMS upload storage and disposable hosting. The embedded URLs, such as http://kameleonhastanc.hu/files/file/56004372165.pdf, are likely used to redirect users to malicious content. No scripts were extracted, but the overall structure suggests an attempt to distribute malware or phish credentials through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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://kameleonhastanc.hu/files/file/56004372165.pdf In PDF document text
    • http://ferrogep99.hu/static/media/file/72888221449.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/tipuzixiruvirujanukavug.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/af67889358a31233b1f6fc152d8b01c4/32689153378.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/pagm3r5665ukbtese4ui7mb2cj/51458757444.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac8ca48435---28686953083.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/sazunamoxer.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/3cd392f14f30f38833d54a931cd3d0e6/61765613222.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/dikitufabekozebikag.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/93173564229.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d5bcd2a13---zewafapinoleperus.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/98872635727.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160723ab160574---43500943699.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/akuzurigefelemowudojugu.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bac25884823---julanemelekijex.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/58955555630.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/guwijorulivatemiladoki.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076c4542617c---nexotuseratenikidinarutu.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd2418923f---62062101481.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/kisemedakojajebelilasi.pdfIn PDF document text
    • http://e-photo.lv/ckfinder/userfiles/files/tajagadewikafi.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7478475e7---zapiwor.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/vurunitidunugexisexanixat.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/vcph29c8a6a8svbd85q6mjb6g3/4312311799.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853661d3889---warumobibub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=death+be+not+proud+movie+onlinePDF 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_off00010110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10110 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11922 17724 bytes
SHA-256: b5aaee7ab00e73e9b12b7b1ea09f5b9823a7a99a340eef8afa6759c9ce6b399c
font_02_sfnt_off00014811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14811 10796 bytes
SHA-256: 8ac630bfb4b748d96bc4da5c8e6b49ca5bb94f00589c3f1a1ff9f7133fc791ae