Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed544c292c9594e4…

MALICIOUS

PDF

66.4 KB Created: 2021-09-01 17:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ac6116c7930e6fbcb4a455fc0a80d289 SHA-1: 383f2cdaaa58e595a9d58b340f408efd47fd24c0 SHA-256: ed544c292c9594e4fc5825440e524dc4089ead49f0f57934eb804005e3a48ce8
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8521

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://aneri12.cz/res/file/73657642031.pdf In PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16092201ecb168---78034647433.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/moneledajazujeluleziv.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/6565276076.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/99503851044.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/c04595dc3e5ec6c1e7ea3f97e120a7b5/31525618065.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1ee022437---pazotubogisopefeda.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/29209359114.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/77f00c9654ec196c6f3fde6dc129bf00/93675434282.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/vomokevodipene.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/rq6v2efqj544dnfda5r9l5t1q2/gomuguvose.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/4768v8brp5sm7prm0n8nchgh45/20913997246.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/21533142592.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/69180859908.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7810861bd0bb573c24612a7328ee63f1/33050404869.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/d851af523b0f669356122bf91d7938ab/84493358819.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/tutuzonogixukokagafe.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/34235eebd7fde618d633faf2cab9c89b/66253697133.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/lowomovajez.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8bd2edfcd---kebunexomudirepabum.pdfIn PDF document text
    • http://spad.kr/userData/ebizro_board/file/1183431379.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99988072037.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/b94ee74e2efdc338a4bb5074c85c5d65/vexulal.pdfIn PDF document text
    • https://qualitycountsclIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=easy+fun+quiz+questions+and+answersPDF 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_off0000f171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF171 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1