Malicious PDF — malware analysis report

Static analysis result for SHA-256 4687a5dad08c6ac1…

MALICIOUS

PDF

92.9 KB Created: 2021-07-25 15:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f46e72b6b3f894de16af131d4b288db7 SHA-1: d331c61feabee38e0ba10b23cc550008f8023a82 SHA-256: 4687a5dad08c6ac116e63f13b0cf9ffeabb516f6d079a0bde9449294fc1e4686
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution lure. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3113

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://yuha.be/_files/file/16970113232.pdf In PDF document text
    • http://mim2010.ru/userfiles/file/vojerufakete.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7711f3e4e---fomagolafazetaxeme.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/12561605799.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/nd7pf7h9heshun7sgnqhc1jten/17625363111.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a238da0a619---91140759147.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160805ba203f8c---59670836481.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160827d327b01a---14417692129.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202107file/2021070217155970554.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210705_EBF9C2A45EB9C850.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/a85edb49efcfeba102287c19286e7785/8587938789.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/1ab2fa29a8feca38860d66303bf8429a/27418578339.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/3452172464.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/tiforofidonidupimikavosa.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa163642948---loremiv.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/mixiti.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b2368fa291c---bugakudefaz.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/aea025cdb88eee2d2a2a6c204d371509/22836196473.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/4ac6d1ef4a64cff716456847aaf8f9ba/fuzozodunelas.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jasunovagaved.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/78501313934.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/mvrmah3hvc17do11ternf9demp/55604782587.pdfIn PDF document text
    • http://stillwaterponies83.com/clients/74660/File/17790554113.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/52700170420.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e4ce1ee27---84218125757.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=over+the+hedge+full+movie+download+720pPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB0 18784 bytes
SHA-256: 425bd98cc2b7e8b58537f798738872a169b8225580dc7e5468179dcc4426077e
font_01_sfnt_off00014b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B82 5100 bytes
SHA-256: c07d61d80b5cddf9e174a1d7f73fa87730b2841b33f3b3f457b66eb916846bb8
font_02_sfnt_off00015e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1