Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5c159acd190acc…

MALICIOUS

PDF

83.2 KB Created: 2021-09-05 10:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 05336e3f62352b6f697440d811839308 SHA-1: 9d0687f2275709a2d4064dde396ed548a1b060f8 SHA-256: bc5c159acd190acc91a73046834c8f682122bcbba9a1e8a65e6552fb9332a712
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs, many of which point to compromised CMS uploads or are part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate the document's primary function is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8660

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://garglob.ru/uplcv?utm_term=adhyathma+ramayanam+telugu+pdf PDF link annotation
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd96d8a9f30---45170353292.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/serug.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/galogir.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/domirevomaforopaje.pdfIn PDF document text
    • http://cy2hand.com/userfiles/89614045790.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/a5737c55186dfdfc463606677bbcf828/41056616176.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160dd8b871eb0f---gugabefa.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/95612795158.pdfIn PDF document text
    • http://evansmedia.ca/userfiles/file/buzivabaxonasirof.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/dewosusuzumutukesuxe.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8c17b49c8---79884729012.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2684a792d---63267107647.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/d63ddbe59602957465ff2a82ba77694d/82513585799.pdfIn PDF document text
    • http://gibisch.org/files/files/zedorojid.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/31955361924.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/97792204236.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dda0c22b717---55649644145.pdfIn PDF document text
    • http://ccadl.com/files/20210820090217.pdfIn PDF document text
    • http://sartor.ru/upload/files/61903646805.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ac16831e0---xemimibegeropexu.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/4vvjtei203nhao5o7lo8e0str2/67404816440.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/uendg4uuc7ckdhriucbe7lval3/repimis.pdfIn PDF document text
    • http://effekt-film.de/files/file/89343107788.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/lamesivegupuwiteti.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_off0000e0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FD 10760 bytes
SHA-256: a18557cb0e92f4f1e3a9927c608bc0cc77f2d935eed0c5a0f6e6d1a59dac9fb6
font_01_sfnt_off0000f95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001116c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116C 21736 bytes
SHA-256: 7301f8ccbb38d52bf9956f9e23a20e48ad3562d45bf793f8c33ac00be2c61b5a