Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f8b6d6227c3cdd…

MALICIOUS

PDF

80.0 KB Created: 2021-08-08 00:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 06e1158f3ce07888382ff2d47f432c8e SHA-1: b437987d350352922b92a19a656ab66467456b30 SHA-256: 09f8b6d6227c3cddab6b10543ed623d72d24f1f8330be1092f26956557ed4eda
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised WordPress installations. These links likely serve as a lure to download further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4964

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://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b37971014---zabapi.pdf In PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad00bbed61---tidok.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080b2686c9e5---12284632108.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/29655075132.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d22a85c10bd---79411856037.pdfIn PDF document text
    • https://fisheaglesafaris.net/pics/user/file/fopana.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/b11efd91a583baf3f9035d82d4adc557/23262897866.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/82279985556.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/47842253575.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/14c13de2ed8b6cfc8c115ab924a5565d/94103252482.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/lufubatuwujavox.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/vipazefev.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/3416808042.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a896f5393fa---lugozujufibafogaruwoji.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/vumafosadenukav.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16076a90a1c168---jotipofipule.pdfIn PDF document text
    • http://zubrcup.by/files/files/47596452.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/772a042a808156968609a8cd056aa355/59206931396.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-14/20210514195348471831.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/9078ae52dbc9c0611c535a3205485934/38388568302.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/luxovazak.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021072417210173499.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/xelawonerotazesoxom.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1610cb6ce08cfe---mufawuxugaxek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=comptia+cysa%2B+study+guide+exam+cs0-002+2nd+edition+pdfPDF 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_off0000eb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10343 18088 bytes
SHA-256: bbeecb0b093e4335d72b7f2aa01cc6823e149b4febc87dbef0cbb70e9829c388

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