Malicious PDF — malware analysis report

Static analysis result for SHA-256 725542d652f4e395…

MALICIOUS

PDF

59.9 KB Created: 2021-05-09 17:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e9331c7d5130d4b9e96aca381066ae7 SHA-1: 4b885c31b50ce4afe130bb8b18605c685c838b7f SHA-256: 725542d652f4e395a19e1b1e84870170e02cc71e04ea2a92546cc284f08d357d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9398

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.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081eed01c4d5---varezi.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/7dab44db08e32178edaa2525ef04a53f/dukisof.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/372hfmgal3gjbh2j9gttmfa896/kodizusisunuxopiluwos.pdf
    • http://akicgiyim.com/userfiles/file/wozanemetukoxavosewu.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/ctolcsuobib3chntc6vjgjq0k3/19701065312.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/85dc2e647123f799c97f1f010a04582a/29264933234.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2ec8b7a55---tovimutoxaputil.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709d1e5347c---merafarin.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/ae409ae92df2a9a002ea8a177f049c68/lemelawamidirotuwagupog.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087117c13229---68926029833.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/3aa0b431469f3f87c7462ac71ad4ad4e/39442752124.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a02e21bf2e---nakenelamuzebazumokinat.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/335ef9088485e5b079ec8f8e7fdd62f5/palavesiluneg.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6d6e8affd---72937496434.pdf
    • https://artlabjo.com/userfiles/file/toxujirimezibilev.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=church+anniversary+flyer+templates+free

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