Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9d712faa30ad2e…

MALICIOUS

PDF

81.8 KB Created: 2021-07-27 18:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: c65c10e3813c9db00638cfa83dc0d465 SHA-1: 3bd8d76292472ccb1bcad67b7e9a4cbcf8e678c7 SHA-256: 9b9d712faa30ad2ecfb4b091d702e001c2bb72a85247160dd6ccbeda5c163a52
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm directing users to multiple external URLs, with several hosted on compromised CMS platforms. ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely to lure users to phishing sites or download further malware. The PDF structure and link farm nature are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • 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
  • 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://tencanpowder.com/d/files/28600500456.pdf In PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/7d04132f5ee6eb48ba9fd3e073a272d1/pixirefo.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/2385571448.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/wewulipujorekopatope.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/wetovumitawuviboxa.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/d2oavthou4giqlhv7d2b6hsrv4/xeborawexurofog.pdfIn PDF document text
    • http://lyshiying.com/d/files/xafemes.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/76f7ccb1b2f6dea9578240f649357b8a/vufinexazegibidogomijawaf.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/vupalodakafugaxaxotuta.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/mhvnc06ulc4k9l0sc9s6a9im81/bitudurixofibofase.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a260b1ff0---38957479871.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/wadagowokivezapopi.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/c66039f7299ab625c80e473628ed98d1/93451077059.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a4adc91cc6f---70753524783.pdfIn PDF document text
    • https://asi-filter.pl/files/file/4616977128.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/20176203488.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/dofopojosizuravozubew.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/jibinidiwur.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/58232482092.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0ffa05532b70ae1226b3ee9d561f2404/viwemerafixazizana.pdfIn PDF document text
    • http://ahs1968.com/clients/d/dc/dcea35c349c70fb55dca458fc6558ff6/File/turafipuguvuzokimipitowaw.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1481dc608e---14117488534.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16091160a80cfa---41443600853.pdfIn PDF document text
    • http://dges.in/userfiles/file/70549883961.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/rm16pspafatr51ooang6s09rv3/wapifinovi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+giver+chapter+13+summary+preziPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D9 11080 bytes
SHA-256: bb9cdd27787ba4951571d24497e5a95f51ec8466d70453eddb6db1f65b3071dc
font_01_sfnt_off00010cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDC 17220 bytes
SHA-256: 731cde9a712fb89905ac6f544f28aca3e95a97fcdf574afee1b6052a7bb318a1