Malicious PDF — malware analysis report

Static analysis result for SHA-256 487b9d6016927f2e…

MALICIOUS

PDF

102.5 KB Created: 2021-09-05 22:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e4e7c28488c3ceb992b4ccd41d9c2d1a SHA-1: 07d71e837291a907f8479a248f2fc0ec98f85d5d SHA-256: 487b9d6016927f2e0ac872ed7a2ccc801b56797d26813fac82e5387ed6cccf9f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed multiple heuristics indicating a link farm hosted on disposable domains and compromised CMS upload storage. These links likely serve as a lure to redirect users to malicious or phishing content, aligning with a phishing attack pattern. No scripts were extracted, limiting further analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3333

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://okeefesreef.com/ckfinder/userfiles/files/23110584340.pdf In PDF document text
    • https://stka.gr/ckfinder/userfiles/files/sejoxuxafukudavexijugabag.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b47f1c241---16830360147.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/tjq87o3bb16kifuki1pqlon795/14599203763.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/fudopo.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021081602101641.pdfIn PDF document text
    • http://www.farmaciabergua.com/userfiles/files/tajavuj.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611da8a34e296---7617769629.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a26198c9d1---sevevi.pdfIn PDF document text
    • http://es-hanasaki.com/yamituki-n/uploads/files/volovofukewolemati.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/c82b87bf8ec45eca6c0dcfbcc7a7682e/87901089422.pdfIn PDF document text
    • https://5of7edwardstreet.com/assets/media/files/fevoxilerodigopade.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/tueho7m8aqsa3lpmmjtubmlic2/46290022691.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/92375438287.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/jewuretagugak.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/19910978109.pdfIn PDF document text
    • https://eol.org.pe/ckfinder/userfiles/files/jesorulolivam.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076143322c51---35268812383.pdfIn PDF document text
    • http://starrwindow.com/clients/863399/File/duzebokewegatalena.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35ebab9a27---41247569112.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sisegixeximuvolemabi.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3ce35b678---67974358204.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=worcester+bosch+30i+erp+manualPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001442c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1442C 18432 bytes
SHA-256: 45884ff62fc79e5cc6715fba21d6d5ba5511c5364b5bc7c8f658c80ff1cd6594
font_01_sfnt_off000174a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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