Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf80e7a9db45d4a…

MALICIOUS

PDF

72.0 KB Created: 2021-09-01 16:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e06774d17e0122d95aff4a4da7aa2378 SHA-1: 652c05bf7e98a4c993587d5555b1ad2cb1369c81 SHA-256: ebf80e7a9db45d4a9c3ea9bb8c2ec031e33f2daa9d707c21b4be8ec449be66b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to potentially compromised websites or disposable hosting. While no scripts were extracted, the structure and URL patterns suggest it's designed to redirect users to malicious content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9684

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
  • 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://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/ca9389b7da1a0c71c1eca761d5038574/fobil.pdf In PDF document text
    • http://rauvuonsach.com/images/uploads/files/peberewumebenud.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/29490326890.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/50065650792.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/kumapesovujefisi.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/gigaduxojemabokuxateror.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/najefes.pdfIn PDF document text
    • http://woorymart.com/userData/board/file/linadox.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/bozudakejisilitoxexadamow.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c63b4b34a3---23676353012.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086f9d49fe05---16826574476.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/2008698627.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8e18a2fb8---zutoduzev.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/13906102603.pdfIn PDF document text
    • http://danfilenemd.com/clients/67744/File/vopafubobavekokisive.pdfIn PDF document text
    • http://retailcop.ca/files/wizunuguwinemukije.pdfIn PDF document text
    • https://clubsportedinburgh.org/userfiles/files/difimogabujesapojemoxas.pdfIn PDF document text
    • http://pinxedien.net/upload/files/64565572782.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607794e5dfdaf---gabiza.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16084faf0687ca---tizubixolaromeluf.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f299db5a4---34432287151.pdfIn PDF document text
    • http://goldenrulelodge24.com/clients/860883/File/99312057165.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210506073726.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/aca02261ddc46220d49f2c4fe55a7d5b/godagejugowimoxelesefanew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=dft+manual+for+streetsPDF link annotation
    • 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_off0000c48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC48D 16388 bytes
SHA-256: ce8deda52cf002bac842a7fa26377aaa09bbecfea9454a734bbbf5655431c96f
font_01_sfnt_off0000eed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EC 10384 bytes
SHA-256: 292b6a68bd2e21c10558a0348371bdc87d6aed5cabb741fc4d83a7160926e51d