Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a5f08c54ed600c6…

MALICIOUS

PDF

84.3 KB Created: 2021-05-24 01:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad57b8e542350ce49af9eec44d7e06a5 SHA-1: de4ef9ee844c2edbf0b63a889cacdceb755979aa SHA-256: 2a5f08c54ed600c66003197f0a6e828711e50441a1429a8de333424c709254da
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8274

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://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a0fcd7252076acf610948a09fdfa97bc/pazozigixetewotasanepuka.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/1875e0495dfeba77137dddae6e1451b5/2135129856.pdf
    • http://altelaw.com/uploads/image/file/33220047057.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897673d13b3---92933803039.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/f89b029cc5ccbc6e6c45071aa816e545/78379882825.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd3813773c---saxavumitasubewaf.pdf
    • http://asesorgubernamental.com/images/file/beludemejuremajugiw.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094a685f2dc9---togedatebivobu.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/190f6bab229c358b2a6c9cf3cbd0a078/19232916117.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b114f17219---85773136447.pdf
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/fatubugejopimidalaka.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb7ae0c042---vokezase.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607228371e012---30941202354.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/e0dc1fc04074dfa5986c1a04ddcf01df/77237949264.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607952e802cd5---gemaza.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/3caec05a4f613713d62778785d0724a3/58339773616.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de7e4afccd---29504276115.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8b49de89d---fiwajubowibumefegizegaxop.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/9f8775ddbf17aec64ad76ece5754eb47/32450175492.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=getting+instagram+followers+for+iphone
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012386.bin
598c06d1297d3aca327053f6802dacc5ce6fb215d4f7d8cd08e6b75f77d48425		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12386 5440 bytes

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