Malicious PDF — malware analysis report

Static analysis result for SHA-256 79e7aea17d851bf9…

MALICIOUS

PDF

79.7 KB Created: 2021-07-01 12:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7713bc7ad1843c8b324c9fffd53bdefa SHA-1: e71d9cf4b1ec0109124c9828cc882a8f736e35e0 SHA-256: 79e7aea17d851bf9dfb23cbc420692552437fbecbec78b97a20540681e4a9e52
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the nature of the URLs and the heuristic firings indicate a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6056

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://garglob.ru/uplcv?utm_term=countable+and+uncountable+nouns+worksheet PDF link annotation
    • http://lycee-elm.org/userfiles/file/38608399323.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0fa679bcb---kuronejifirebasemajavobeg.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071470b92941---65559180420.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/aojkgikg3kjrh68fqib695186d/16346392462.pdfIn PDF document text
    • https://activepymes.com/pub/file/difure.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/b9451f129598d7da19f4bf8f05f97913/deduwobageserotikob.pdfIn PDF document text
    • https://advik.net/userfiles/file/49705767182.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/49uqdhf2iivovchhg1v4gs5vl9/71312030456.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/35293703868.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/9522521729.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160808911bf210---48015163858.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098422f3607b---80147611813.pdfIn PDF document text
    • http://4bx.pl/public/file/diwijodefasebomotuwefiki.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/97641669120.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/akluu7qm8nnh36c84uojlr3sa1/14843134209.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b14feb171b---86794019105.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/balafanas.pdfIn PDF document text
    • http://oprfhs70.com/clients/879438/File/juzuzolonajukudanajipexow.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608267b20eb0f---67574407288.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ekegsn500ul41m9vpk9cdt4tdb/27191494711.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/fadenoxagalegitamerep.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/7910354022.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-2/20210502005641114197.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074a9758cf4b---sorukiboxusonekiwe.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/gaxumugin.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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