Malicious PDF — malware analysis report

Static analysis result for SHA-256 605fcebc4a94cc1a…

MALICIOUS

PDF

131.9 KB Created: 2021-08-20 00:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 56cefe9cf0ebc9cd4f0aa4466d996d7c SHA-1: a91f0297c69035a7974bf9524ffdfc120c64000e SHA-256: 605fcebc4a94cc1a7e581fc764c28be38a051252c15e368c43be4c4ce2d642e4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier clean score 0.2366

Heuristics 5

  • 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
  • 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://littlepearlbooks.in/data/eimages/file/wolimajijezejepanofo.pdf In PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/51715754581.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/1al333fsrdbuunp0gh2bo6musm/38136335532.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/difejejulifedij.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ae59eb6c0---23879452863.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/tabujofex.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/xixidaxivaro.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/98925760146.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/mafewaserulujedakurina.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609faf65819c4---54769285424.pdfIn PDF document text
    • https://360mart.net/uploads/files/vuvorif.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/3p06c27urbjcbfckeu50ff0g22/mevusekexobo.pdfIn PDF document text
    • http://hpmcfamilyreunion1968.com/clients/83891/File/zekek.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/93710457652.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/f401ed3554138a3938084a5c75486bb3/gedud.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/vazufekuve.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/5332690617.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/pasax.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16112dd66ba234---digokol.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1611d48547261b---tigulugedojuwoxitugakij.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/71608882405.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/lf0s99j4nnbeu5hq65mbtvgdu9/gesedejivolopinabigurifad.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/62177478930.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/damepidikori.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/dff66af99b90ca7369447caf79c9e2d5/76069267750.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160872d874bf07---xufedapek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=estructural+funcionalismo+mapa+mentalPDF 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_off0001bc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001d447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D447 10724 bytes
SHA-256: ec5873cde22ba89f48de0b28d4add3d0cca83eedfb9f36a9558e66e091bc9643

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