Malicious PDF — malware analysis report

Static analysis result for SHA-256 eccfc14e5986df7e…

MALICIOUS

PDF

67.9 KB Created: 2021-09-03 11:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4f5b79f6df6c74d4602265dd6306ebb6 SHA-1: 1458fda6cb9f4fc3427196b18c5dfff2f3465fd8 SHA-256: eccfc14e5986df7e85811e8ee765d4bccabb28cb528c129e707b5cd865a4c42a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it likely serves a malicious purpose. The document contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5262

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://oniceh.ru/uplcv?utm_term=ensayo+literario+caracteristicas+pdf PDF link annotation
    • http://www.parinet.fi/tiedostot/files/55725841645.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8c165fefc---41922044469.pdfIn PDF document text
    • http://detaycopymatbaa.com/userfiles/file/60084718259.pdfIn PDF document text
    • http://schule.havonix.com/ckfinder/userfiles/files/futeg.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/veir5kjcnck3hdvb307h2at8vp/kejubezojuxovi.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///mamonisijanubalepipup.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/11707382025.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/tubimivamebejewinanus.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4b68f26e0---44150829171.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085ca6d5a338---vajolutuwosuwik.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83d9ec8521---47759718169.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/12120618766.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c79f7de1334---54262623879.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/46404732205.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612927f1843c7---parewoxokolorarog.pdfIn PDF document text
    • http://putzlappenborner.at/editor_up/juwilifebuwugetur.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/99295866229.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/libuxupamuwodinogexokozaf.pdfIn PDF document text
    • http://chemicalengineers.ie/images/vakodaroz.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/63573015821.pdfIn PDF document text
    • http://zaintik.org/files/galeria/files/doragejo.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/60102228229.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16096fa1460ca5---63385554407.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/30d12e508c30c5c109e348360717cb26/29603713175.pdfIn PDF document text
    • https://aedwea.com/upload/foto/87388085402.pdfIn PDF document text
    • http://hoangminhphatkorea.com/webroot/img/files/58997078037.pdfIn PDF document text
    • 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_off0000d8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A1 10708 bytes
SHA-256: b07a7fda3933e6d0d7566a25914bc5036fa975cce2b164c6ba78265b111c0168

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