Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a810165f209d4c5…

MALICIOUS

PDF

116.6 KB Created: 2021-09-08 08:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b7eb306389499cb18c61790412028a05 SHA-1: 367a83158c5c637144c28c15c65d0dc258b81baa SHA-256: 3a810165f209d4c508a68ae8026f19736db4073c034af769609f020344c08902
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress installations. This structure suggests a link farm designed to lure users to potentially malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.2414

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://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607624cc4e1d8---71616433895.pdf In PDF document text
    • http://traiteur-ribot.fr/userfiles/file/52498366498.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/b1c6a97a76545d3ec060c999c588cc39/zofisimomi.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021060803275673499.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12853878ae---25481622299.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/81674693371.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca21f39c72---31639365939.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/383p71ikbqj3tqb02plq1g1rm4/59672468844.pdfIn PDF document text
    • http://kelsenator.com/userimages/57827511673.pdfIn PDF document text
    • http://www.facyt.com.ar/ckfinder/userfiles/files/ruroxefitipedogajexa.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/59159817565.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/8721453220.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a8e9b7922b---betapuf.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077bf42267a4---53831523796.pdfIn PDF document text
    • http://ks-puyuma.com/CKEdit/upload/files/bapisinafuzageseno.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/769029b8a65390c047330e1ebd54d79c/82316641056.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/bb00e58d9554461e35aaca4d938b06e5/66084301469.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/6cf3013fd41d33e13a5b9ac7a140dce5/jomamapositumeb.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/91048630166.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/gugawu.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/91359858998.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/gavixewisototofo.pdfIn PDF document text
    • http://indigobaby.eu/upload/files/vetelazimeneduvabijuk.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8648b382e---penukojosimera.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=freemason+encyclopedia+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_off000179ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179EC 19612 bytes
SHA-256: 89f45570567678cdfa511c59c82d787b8ea18554960440f77c1b9f5e074f4b62
font_01_sfnt_off0001acfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACFD 10772 bytes
SHA-256: 68fd1a728ee71c6acba3d1ee7fda06a4c736a8f4e04ef212756bbdeeefb79edd

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