Malicious PDF — malware analysis report

Static analysis result for SHA-256 8963f24b34380dd5…

MALICIOUS

PDF

81.2 KB Created: 2021-09-08 11:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 144947429211a57757e3858c6194e592 SHA-1: 86f6fb66e8241cfa6d0e15d27b22caa2aa7530ac SHA-256: 8963f24b34380dd56f40bbd12b98be2b12aa4f87a43ce7c2d912c0e292ea82c3
176 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan, and an ML classifier indicating maliciousness. The presence of a callback lure suggests the document is designed to trick the user into calling a fraudulent support number. While no scripts were extracted, the document's structure and URL patterns indicate it is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7787b6c21---11574773826.pdf In PDF document text
    • http://www.aqsclimited.com/EditorImages/file/2696823042.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/91298675810.pdfIn PDF document text
    • http://kayapalinakliyat.net/file/kejimofaburiwiginesut.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/546cf7d8bea738d139b7cba2cb8d7837/dazimejifetizadine.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16087815f590c9---jomira.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/gf4r621j5srcocma8rgnb65soq/20336617245.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082155131a05---lerijajixonexut.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210616055126232.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/ef6bddf9e6759c5e526f31630212d4c2/44361962028.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/64273652986.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160984630684d6---jebexugilub.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/lukugovom.pdfIn PDF document text
    • http://vssteel1999.com/ckeditor/userfiles/files/rexeduv.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee2cd135cad---pomesedejepawepivuzew.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/098ajssd8agbdevtqp07mi8dgv/42614947892.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/29747754531.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/bezowebalofuvejikiwuj.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611cd32513506---8213223462.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/kuvolonibe.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f9be21795f74009c57d8a3cb5e109f75/lubobaserunesolevevazemax.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/zanumawirixoni.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775251a020a---fesotezofidexukusolelu.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609120e63791d---samulukujis.pdfIn PDF document text
    • http://melinterior.ru/userfiles/files/runotapo.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/nazasimijebap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=ice+cream+recipe+in+marathi+pdf+downloadPDF 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_off0000d835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD835 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF047 17876 bytes
SHA-256: ffd59a66901824a589769b2d66b5f29a98f5931bf3c0dc41108417037048082c
font_02_sfnt_off00011e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E99 10756 bytes
SHA-256: 44b4428654d35bf4fef9dc5e3d407c7fa27916a7b40b328f5ee299b50eff3acc

Open this report in the interactive analyzer, or submit your own file for analysis.