Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0456137a12ae876…

MALICIOUS

PDF

82.8 KB Created: 2021-08-18 01:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e22eb1583e7faa7fb76b660d13b76e82 SHA-1: 8a4dee5e0e9ddc193a17d05ca89fb9e0878ac819 SHA-256: c0456137a12ae876c8dd068d5ca058c824842b60038f2469c954a75b73d49e9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains a link farm pointing to multiple compromised WordPress upload directories, indicating an attempt to host malicious content. The presence of these links suggests the PDF is intended to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/lc3nbltdm9c83md13hb318ha56/webogikikufuwa.pdf In PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/fbbc94fce726b1059fc6a608f2cd06be/junabuvuwipilan.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a14183e0bb---92505142751.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/zegobupesujuxenik.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/jovat.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/bj4j4kig3b3fh71g0ume60f1ps/7351852733.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ce2297ce176713e95848260d271ea676/fotebaloreronulopuneniw.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ae79790bf---lamaxazijexomemotixevup.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/demowirofoli.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d502b05a87---89734962389.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/84a0a45a65a35f3e1c908fdc01072135/wapesajelineguvi.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c398ae721a8.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/xasixelabelurobikobow.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/19348011869.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/sefezoxodofen.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/40022484249.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/563082678b7d1436ef1ba71b1ff47ae8/84779826909.pdfIn PDF document text
    • http://danfilenemd.com/clients/67744/File/48133760155.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/29821367785.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a26cc819f90---jevujosulawobuzewad.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/bb367335974017aab52b2ad0b5a12179/50678603980.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/volojadagu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=saturated+steam+pressure+table+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28C 16596 bytes
SHA-256: 72476db2062ddb1aaafe81979f7e0f2e387a81fa351c3125b2a530cbf8d83350
font_01_sfnt_off00010dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD8 10656 bytes
SHA-256: 985f1900f193c2d5544d01bbcd0c3589492a21c881c76e1429386680ed866a13
font_02_sfnt_off00012609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12609 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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