Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a002502027b535…

MALICIOUS

PDF

75.9 KB Created: 2021-09-06 03:36:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 5426e1828d7b8b7dfc5ab9188ddc0801 SHA-1: f50c6a1c260c23d6deaf4f3c09e63c03259f911e SHA-256: b7a002502027b53536fbee69c45875279f4becd08283c46ea8717441b73836cd
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. 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 suspicious score 0.4682

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://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6056e60f0---pimuzotije.pdf In PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/37837647579.pdfIn PDF document text
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/87715013377.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/wolujovulumeraba.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210904145152.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/wedafewezeruwegaxas.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/60360893244.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/362f1e87615642472b6a171d6e9c9e8f/wanutedutopi.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/vedulofejofojo.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/xozikeperixeseton.pdfIn PDF document text
    • https://landi-bg.com/images/file/wupekokujipikatolo.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/51225699087.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c86676881---66955792889.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/24979826510.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210730190105.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/67e715d698fbc088659a1d2bdd28f080/kisizupewofemofemelu.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf700612e7e---sasadojalubokij.pdfIn PDF document text
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/nuwir.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/vujuvipi.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b45e58fb2---53089740450.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/31d0d76cbd0cc8e6af39d9dd9b3b8af1/fazugatalixuwuti.pdfIn PDF document text
    • http://jucal.es/images/file/67519935767.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160890267db117---zimelugifupafozajoses.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/kowovav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=hypertensive+crisis+guideline+pdfPDF 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_off0000d94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF161 10784 bytes
SHA-256: 4790068de61b4b24d37b2a1865f541797ecb9c628cc8684865861e55de2d113c
font_02_sfnt_off00010a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A22 16608 bytes
SHA-256: 727173356b24f8f4c51918f6595529c6f7d68006c1ab2327954c7a99ca76a421