Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f16f212798fa7f…

MALICIOUS

PDF

95.4 KB Created: 2021-07-24 06:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9b281dcc5ed57f3e1ffb62d248a30f93 SHA-1: 53e15e49e3dbfbd375279c11f22d42316409cf22 SHA-256: 99f16f212798fa7fb4fa50d414cf2397eabdc4c524e3dd43ea17a170fcc5301f
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, specifically within the 'uploads/php/files/' directory, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/94cc7e14aa85ba7c47df6548af40d5b8/wefugugozolap.pdf In PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6893a2cb13---domopob.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/8f5cc3a3aecc27e04c76d9f3eaf8e2dd/talesojarax.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cdd76a19d1159c213c90021bc3bc32c1/85306227403.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/ad5b61ccf464032cdefdb949bbb75243/jufifirazogeredozapa.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/287947af1dc74581fd026531275f973c/91766770764.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ab51eab0c---1403076778.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/zowimapa.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/dozewep.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fddf33b1b---dumogigakaxufenobosas.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/c8a0sglhn8m0sjvvcb8bgov7e6/45382701798.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/d15d88f021d9e4e34f05b32569e6e68f/resebusuzulovizifetasaxa.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/tloqr1eah6pp479uv5hn5r6l6o/rutojoruwejigijetoda.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/verim.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/xipopepasamibidufaxuxutub.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b877942f71---15391134318.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b98c8cce56c---9904803472.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/1cf271fc3aa62008304734f9c7e82ea8/kemapojibafalawurumovizon.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff5a13c50a---90209730579.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad50218797b---56103467698.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/mogunuzugumib.pdfIn PDF document text
    • http://ruilong-ironwork.com/CKEdit/upload/files/16764743463.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+improve+in+call+of+duty+warzonePDF link annotation
    • 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_off00014eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EAC 19032 bytes
SHA-256: 4486f0e477023cdc0fb020026f634d82dba20eda9bbf7d57464454f142a87e15