Malicious PDF — malware analysis report

Static analysis result for SHA-256 595d54b28d5d575a…

MALICIOUS

PDF

87.3 KB Created: 2021-05-16 10:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d64a69f4e16d5c0de50f49f15a804fbe SHA-1: 2b90f64bae774b1f0da21c8c582d0ca7d4cfe0a5 SHA-256: 595d54b28d5d575a26b064968ed35c67ea0f5f4a8cc45fe2cb4c1312a34f4813
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites, indicating it functions as a link farm. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6974

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 https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/9qit3kiogroprru1lerm13fpio/solemesalikaretitedep.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e342bdb1---211691035.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b95e6a76c6---7813607450.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/288febaf0c397d6534eb8d434ab22fe5/lipizuwatorodube.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/5fa8ee09d7bb9a7f155abb2ab22f1380/5829054376.pdf
    • http://driver-jazda.pl/upload/file/34410811324.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/b4uvcjbr0k5kdqoerp1564i742/47004759376.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608781992dd49---50482320924.pdf
    • https://binarbaidservices.com/public_html/userfiles/file/javugawatasejixaped.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075951e259ae---lefaxuratiruk.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/6e2175556dd87570c95afbf31a5c7568/89492480555.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0fa492af3---kanidexidezuzepamumi.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775cb0c6daf---79091875708.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074225fa6244---mejovulabugido.pdf
    • https://healthcareadvisorsgroup.com/wp-content/plugins/super-forms/uploads/php/files/hboeeccfa1v4mfrg1seb9c6dj7/54447795753.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=2004+buick+century+performance+parts
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011dc2.bin
4316a0f3c5df21e6030781f9dc46e301ad7df834826f4a1cb195de95ce443dca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC2 5704 bytes
font_01_sfnt_off0001311c.bin
bd8c1f625b29f2d491af45bd8b7f18c7a5786acf18a1d09318148a918d45e8e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1311C 11088 bytes

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