Malicious PDF — malware analysis report

Static analysis result for SHA-256 7189dd6d8b1a15ae…

MALICIOUS

PDF

88.1 KB Created: 2021-09-02 15:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 09c0afd8f82ca98681641b4bd3169ee5 SHA-1: 447332f8d5c45218f297de1c0fcebe2aff368400 SHA-256: 7189dd6d8b1a15ae78c0bac5cdd04581a551346bad46eb8726373de5956191da
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to potentially compromised WordPress upload directories and other disposable hosting sites, indicating a link farm designed to distribute malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The document body is unreadable binary data, but the presence of multiple suspicious URLs strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4722

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 https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/h9fbkoql892isjkkes9shb61bv/tudazekesur.pdf In PDF document text
    • http://aven.su/userfiles/file/lufiv.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/pofoli.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/biguruvagisatekes.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/3a299d4052c67aba39fac36edb9438a8/11569291728.pdfIn PDF document text
    • https://pepsima.biz/files/file/48303740056.pdfIn PDF document text
    • https://stancijanegrin.com/UserFiles/files/pavimivegi.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/gowoteperaxipibajijemin.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/50200856983.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8119f11bb---86372881672.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/feluwepi.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe1dae66f0---venesikixusefabajaz.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/lupaveti.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/b2f881a93c14e5a584265045c449316e/busakoxifonemorejiz.pdfIn PDF document text
    • https://vinaconexmec.vn/uploads/news_file/58610776583.pdfIn PDF document text
    • http://atonoserver.com/userfiles/file/61211202631.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774179c3a0e---futopadazevudefirapij.pdfIn PDF document text
    • http://jpmoto.biz/upload_picture/43041153053.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/73056323080.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/17347895278.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/biwisamugimado.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/susesafomufilijopudafumu.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a52d76822f---norolumusujekiluz.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721de0759a5---62473474564.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=coloring+worksheets+for+middle+schoolPDF 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_off00011b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4D 18292 bytes
SHA-256: 3b485815de84ff9b0b44a27296d60eae7d8dc159591b25e42031b74b4bcfd076
font_01_sfnt_off00014ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1