Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe41e17b8a547aac…

MALICIOUS

PDF

85.5 KB Created: 2021-08-15 11:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b21fe0f65f1771bc73442859df3709f3 SHA-1: a4de8a4c1069fc619bfff7f61fc724b22d22d65f SHA-256: fe41e17b8a547aac31b92aa8f509c9e74b7bbb0060ac4bedaf43e5281eb8a8c8
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and link farms indicates an attempt to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://crysiq.ru/uplcv?utm_term=james+best+net+worth+at+death PDF link annotation
    • http://www.climatisur.com/ckfinder/userfiles/files/zivamaz.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16115a09f9aaf8---bojovolupenizakuzam.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921a81257f8---zuxazesolusagotituteg.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/mubijubimuv.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/f04169490972a1b7d494964debb844e3/wexusag.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/wapapipafaraterikibipo.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae55da2bcf6---depalozozijoved.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d32d3554c9---jimaresimete.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/41558334373.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/91936194062.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/26982395138.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2473ee4c6---gamujimuwegedopoka.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/79044796281.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608303be4de6c---sujubonajefewasagepig.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/42757737709.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/qjort5k7om6i51m9s6o54opb7a/95154597311.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/99704982604.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3cce16644e---kolupimug.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/vopifosizabuzonom.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210811135423_9rb5gd.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/df2e10ebb88e4816639049e2890059a4/86570727324.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/15893561224.pdfIn PDF document text
    • 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_off0000e926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE926 10592 bytes
SHA-256: fa1175e47c13794dde0a867e959de2b5d7f3aac65495c04c45c830d8cc6c57bb
font_01_sfnt_off00010138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10138 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001194a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194A 17268 bytes
SHA-256: a14bfec9a2806bdd3c3b32ce508f4006602b30b7ede5cbf7af4335233a22d733

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