Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea54abdbefeb3449…

MALICIOUS

PDF

83.2 KB Created: 2021-08-15 08:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1f430eb79b2cb7b595e1690a9f801c3e SHA-1: fba52a757bb2e02684e3def3c9ffae976bf24974 SHA-256: ea54abdbefeb3449eebd37ce1826c2de6e2d17c537941777cb68c5e9badd5230
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9688

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://pistant.ru/uplcv?utm_term=how+to+reset+a+honeywell+rth230b+thermostat PDF link annotation
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a7cd2dcab---wefokexa.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec96a304d3b---15291426109.pdfIn PDF document text
    • http://vititanon.com/user_img/files/98851374775.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/fosuso.pdfIn PDF document text
    • http://capital96.com/userfiles/file/fodizol.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f92a92a97c---fafileminovixojuvalepof.pdfIn PDF document text
    • https://bharatceramics.in/ckfinder/userfiles/files/7605182196.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/a4kn42u5fvlrtr2tdt23gi0dhp/21340515578.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/4136982977.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/kezavil.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160730332e1a40---84846553178.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/xedoxujugawipoxixuven.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/favevabatesasewinexezoku.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/7ed2f16ccd84420f78117f306f647e00/36936406446.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee523cdc37---66161121700.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb49d0adcb---rowixitugimum.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdac1b3a4e---83141707399.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/fm77vvnhv7037o1h0lt4sc6rk5/kumowekiletu.pdfIn PDF document text
    • http://www.sanruou.com/app/webroot/uploads/files/bototudevoxasobewijez.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/sb4dgr0jmmh57hu68mi9ve11n4/58146006984.pdfIn PDF document text
    • http://wurbs-hanau.de/userfiles/file/nodetisumo.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/ribuzebikukilajuvenur.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/989f949edcd3abfe3841c44664862cb7/dasadiperufevaxiguwepepe.pdfIn PDF document text
    • http://dream-mebel.com/pic/file/32808067202.pdfIn 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_off0000ee36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001064d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064D 11024 bytes
SHA-256: 9d19e750ee5f2a94de693b2c78c788d79bb5063c0efc42c3d3efc6a363edf014
font_02_sfnt_off00011fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE6 16928 bytes
SHA-256: 68946998af8c6cfb60331c04908cbd3c139d3fb113dc5882914d83b649918e00

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