Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea16075b3c354c01…

MALICIOUS

PDF

63.7 KB Created: 2021-05-25 19:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46801e654019a3a5cedb5f728dbb5fd9 SHA-1: dbfb78900caf07d7334a1f7faedebc37a6e895d4 SHA-256: ea16075b3c354c013f333a869c6b9ef4ad30ac08aec486e955eeb31ad5824c80
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting it functions as a link farm or phishing lure. The presence of embedded URLs and the PDF structure point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7755

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://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/8cf420eaa16de92ec0ed866e853fb60b/34027588476.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/4f3a83366cc39d680db72491206ee132/43188413672.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/7628e1810bb0ad19eeb3bad76d931aee/totobijogi.pdf
    • http://alpanelektrik.com/depo/sayfaresim/file/84758605187.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/fced7fc5e30a1a2e728a0d5ed853fd31/xoxupinewotiponesiridu.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f32abf1356---xilatofuribo.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609735c05e5ff---bubosaxusetozumifalibe.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160969cf235b1a---52682687850.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffc01de782---70797519792.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080e0b3c6bbe---tegoribigivakis.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/db0uen61js103pgdisr92m7tuo/92167971675.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc6bd20dd6---82197139481.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084891b2ecc9---60657990177.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/63051d6ea53217db1916bfcf7a5da80d/62781461935.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/48b275d3c0092d3949a491b6556ff2de/40533418648.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609135234bcd9---togolebavovales.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a8b12ad8a---xeturozurorulik.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=6.2+properties+of+parallelograms+answer+key+form+g

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