Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2aef377ceda0a9…

MALICIOUS

PDF

98.9 KB Created: 2021-07-01 22:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ffcbd88eacbc8eea3f677a073f6982c2 SHA-1: be67929e813253593bd8d25ab153e69fde1b2b1d SHA-256: 5c2aef377ceda0a967802ad69c5b7e398843b064b01cd03cd4fa9305b9324fed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or to serve further malware. The structure suggests a link farm designed to obscure the ultimate destination of the user's click.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

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 http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24e946285e---kerafomo.pdf In PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/a4940d5a5896777a982716ed5e12cf6c/33469633248.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a9d14db97---bolemiwidexujuzexatogurit.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ecfd725ad---lapiwojono.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/17palj3ods63d8qed1efdpat63/90025803045.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863a37ad116---taxefewasimobagana.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607867cb10520---kidibewawodojasak.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827596063e7---45508926978.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/nekadikamoruwefezikafeso.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/43035216773.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/5162b44132370ab54a09891a32c12c9b/18733624638.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/jenuzopebonedifi.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607453158dd9a---50810270673.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/re2i7cvg2k4gtt5g2cqe85fvcm/42301549744.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874a8bf2eb6---tajagupofijabijodobu.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/66444186293.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0cadc2acf---6721759026.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bf595180108---kijijagemifunidabig.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/xovixodexebekum.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/e4ckg3ku2kuluom04q7c1kgn18/tazuzurunukemu.pdfIn PDF document text
    • http://abc-tel.ru/data/File/wolajazokexifuvabeledoka.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16072ef613a402---fogoxamemarowip.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/38615537418.pdfIn PDF document text
    • https://xn--80afc2apd5n.xn--j1amh/upload/files/15868903877.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/jejiwuzu.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99fda015e1---72713432986.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/e324e208e06b66a9ca116d369f76d27b/67225393606.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=a+right+prismPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 10116 bytes
SHA-256: 11279ba06222b7607455321b86414c88b938aba97e69efb0bbbd9314eca91406
font_01_sfnt_off00012054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12054 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13865 16168 bytes
SHA-256: 1cfb00680a8a18ef5d5af493cc5b57cfe410abeba37087ee2ecd799c98b61e68
font_03_sfnt_off00014dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DFD 17968 bytes
SHA-256: c32666db04b82e2937f7e2acc55c77d882a3b8f74ccb793c12929a291084d381

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