Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c0c30fe470504c…

MALICIOUS

PDF

68.5 KB Created: 2021-09-09 17:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 52dedd9ddb3556139e8222f645f6d0a4 SHA-1: 2869ea6d0e73b49e37f795b1a826adbf06d26e8a SHA-256: 78c0c30fe470504c95b4c4145aa9312e427f2145449a7f9593214126987838a2
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

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://farmaciafasolis.eu/userfiles/files/80058332945.pdf In PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/labemosafufusinukewopovas.pdfIn PDF document text
    • https://ms1oke.com/contents/files/bogasuvujatixavo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c96ac1ee1---fobake.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/beboti.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329b9657c2a---35464830162.pdfIn PDF document text
    • http://ih-consultant.com/ckfinder/userfiles/files/12310947905.pdfIn PDF document text
    • http://innotack.com/userfiles/file/84779244674.pdfIn PDF document text
    • http://elitsatodorova.com/uploadfiles/file/43841843294.pdfIn PDF document text
    • http://amdind.com/userfiles/file/94668740910.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/40960218254.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/ditowuxizituwototigafi.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/mereno.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613577e0a495e---fojezegojavawepanozeni.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365f413eb52---wepes.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/winebiberidonixamumimimis.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/gabazatuwol.pdfIn PDF document text
    • https://lufty.cz/UserFiles/files/diwezivorajapoxus.pdfIn PDF document text
    • http://fitviewer.info/files/file/geripudagorowuboxalu.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/a112cce28a30dfd0464f55c818264a2a/7906140059.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/22450781478.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1612f06716d054---67934209483.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/68517460203.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=gigantic+x+mod+apkPDF 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_off0000bc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC34 17056 bytes
SHA-256: 83b0366317dd1960cab81948e24ec9dfa8a45322670caf106362a8485acde0cf
font_01_sfnt_off0000e82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82F 10644 bytes
SHA-256: c0c93f2ef5e9129806ccb91195d8825ca4b7d8b8d0e905cbca78518a301a38fc

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