Malicious PDF — malware analysis report

Static analysis result for SHA-256 2939e77965f70351…

MALICIOUS

PDF

84.4 KB Created: 2021-08-06 07:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 96d9ae19a010c6f9cb9a0e003bef1044 SHA-1: 29cbe11c8216c1e502ab1ba14a45f0ed404e4f0c SHA-256: 2939e77965f70351512303fdae129e8b72ef795b22d4cac09c59634dbeb24d60
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites. These links are likely intended to redirect users to malicious content, a common tactic for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5911

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607df9897db24---kerizumukivimomopam.pdf In PDF document text
    • http://architettotamborra.eu/userfiles/files/38170656082.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/9dcbedd1f01d3f45560797d3acd87071/91510036983.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/pigoxesunakesarefero.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/90182338562.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b27b56a0a2e---51900714917.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/sedarupinusuj.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/b5473c9bc2dee4d8c1a9888c94263ea5/43353642025.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/50859163231.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecc47621b7---95677346343.pdfIn PDF document text
    • https://cubic.is/userfiles/file/pixik.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d4a89addf---45006485165.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/15061376655.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/pixun.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/parugazeviloxisuzedeg.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c94fcc66200---fifikefepufupifafegaz.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/5r1see08236gi16knbql4do8i5/gaxulevo.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16077b51fc1254---35224869023.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/zeduxuwewadetovakulu.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/jigujatogadese.pdfIn PDF document text
    • http://lobi.md/userfiles/file/jopokukidevasemavogudowo.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/75854514828.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ee06ac60048---38472317947.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=o+que+foi+o+arcadismo+no+brasil+resumoPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12030 19196 bytes
SHA-256: 159897c7fb7f97b9865d1d9e4856c33bcb23e3b385441e1621745aa68f860538

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