Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd446f3a40c73605…

MALICIOUS

PDF

57.0 KB Created: 2021-05-21 04:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 921031eb218f0630dcda4fe5e64d76fe SHA-1: 95645ff9b2f289433397be71e7f34ad95bcbf986 SHA-256: fd446f3a40c736054af8d0550899488949e295b582ce5bb9a2e935d110edc0f1
154 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier further support its malicious nature. The document body is heavily obfuscated and does not provide clear instructions, but the overall structure and URL analysis strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6956

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 http://www.odnpoznan.pl/fotki/file/file/75874080310.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/ef3d16cf2dd62b6d719e6b20bd031833/10966989767.pdf
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/68102122273.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a4af5c0a0e8---97892133916.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/74fq3kmkdo83q4td8sslvedpdc/gelasokejo.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3ffc4e01c---gekubogegepawun.pdf
    • http://baigeleather.com/userfiles/file/xirevujuresegal.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a00514067c6---visamodubojinifag.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/8011daf375a7fa65bd2eccb3a44a874e/nofusukikazikijul.pdf
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/e14d7bb235787f1b7d26f9fe1818475f/romika.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160944af2ea881---46301429663.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/67b49e7c8131bc9d0aa30b334f378926/85174595286.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d8f6a4a53---buwigasux.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/b11387d3c383a1ea376515c1ff069d62/wozumusowapogosirovumut.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/9dd993882353f8157be42013f1e38b09/68481497699.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=momentum+questions+and+answers+igcse

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