Malicious PDF — malware analysis report

Static analysis result for SHA-256 d29eef5e59de2baa…

MALICIOUS

PDF

98.5 KB Created: 2021-08-05 13:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 0f7f0e2a2ca40ebb03af3dac4be66600 SHA-1: 2b135a99bb60b4c5d250b43a5a14949189387938 SHA-256: d29eef5e59de2baae7169b38e8f5564227e3c123886206e061545819eb5e96e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious document techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9236

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://pixomot.ru/uplcv?utm_term=stranger+things+season+1+episode+2+script+pdf PDF link annotation
    • https://wietsevoermans.nl/ckfinder/userfiles/files/38898450381.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/dejiv.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/sunemawu.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/61931674766.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/sululute.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/67013126496.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/xasenisu.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/bg2bppb110gl5qhf51a0a6p387/kiletavupuv.pdfIn PDF document text
    • http://thefarmatarapahoecounty.com/userimages/38711728885.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/wavewaxas.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/86583316769.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/doxakafifefezakigusuxuvew.pdfIn PDF document text
    • http://epmachine.ru/d/files/84637417813.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/33990181514.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e2f6d7ccbebb25619576e7f509139ef7/vejojugiposamerufop.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/fanedi.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091377c25561---mudapisisevag.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/e89v26t15s66sk0obr71d1mos3/75723824526.pdfIn PDF document text
    • http://labotinnghia.com/img/files/xakojizujidowa.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/3a1036aa28b65fbce4df7f3b5fcc1150/53407903789.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af77df1e4ec---73930761393.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/70095f2771b1d18d3531dec72f8bd875/98253463611.pdfIn PDF document text
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/nelalanuxova.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_off00012723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12723 11100 bytes
SHA-256: fc932ed26d848ccb3cc74315e6032b9c17df4dd83c7e89ab9b4292354f8ff501
font_01_sfnt_off000140d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000158e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158E2 17744 bytes
SHA-256: b537856a1050e1072b22b8df7ba05b40a2e9a62e900ece8c92c8c09fcdb0b177