Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1765d1344002e81…

MALICIOUS

PDF

73.5 KB Created: 2021-09-04 15:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 9766c24efdb1b739dda5f56162605114 SHA-1: 7a10f46e40001e2d1ad660d9d49ae31f1832fd84 SHA-256: f1765d1344002e81b92e843b511c3d79b1961bdf392532bc3b867163e9d80b7a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

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://pixomot.ru/uplcv?utm_term=aditya+hridayam+stotram+odia+pdf PDF link annotation
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/7fc1df8b85104e8a9cbf517ad42c9bd1/nenimajoxikinaden.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/walakosetodebam.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607132422eede---ritiwunujolusod.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/6773c9efc7a4bf3d93d324af69dc53c4/12561813768.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/a7b836a0b14905c51e7ee131aa63eeb3/63736907927.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/c01c7c6b8e42891d47eb8e2de1db7d8a/50117180408.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160aadd65abdd9---ruvalebomelili.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611deae47a491---38663404661.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130cbbd60cf2---57172655836.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/40763284b23a3ea5909e5e3b57e165a0/najod.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/rimuwuwedisanixivimitatut.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cb25c5a375f---wagibilakugefutivaminutir.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/file/26907483986.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/71459350204.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/popipulufimepekonowek.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/sunixufovogasanewedulu.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161051c1960fbc---33986413774.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/0f45jvo2ea3u9i3u93kf8gnb1p/91154136704.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/7014055959.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/1sese9v3dihtgs01hhc3ii5vdg/tabip.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/8feqaskjsimrolrhri2ap19smm/japurilita.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/safiw.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/b7hmpll3v13j3m42jr7rqlsjsg/xamam.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/rasapovonederifekeven.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/ac8795cb7877b327ed8c539bd76080c0/31719245008.pdfIn PDF document text
    • 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_off0000d3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F6 20464 bytes
SHA-256: acc54d98d9d7d5a4b2d24789ed1389420f40688871cc3b4c23435e2b315a43a4
font_01_sfnt_off000108c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C3 10576 bytes
SHA-256: 6fda7ae6db1dfcefe61164430d792464251af090358731b2aa2d93c853b173e7