Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e218e0a22db22d…

MALICIOUS

PDF

86.9 KB Created: 2021-08-20 22:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: ec663faf6bc4a6271e0cd7640252251a SHA-1: e35728538a28ad1a73834025c9e6b469df9c7217 SHA-256: 93e218e0a22db22dabf35aa2df7083c2a0286b200a426bce304a9042a309e956
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or are part of a link farm strategy. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL distribution align with a malicious link farm used to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 https://giverny-bkk.com/upload/files/vesujopa.pdf In PDF document text
    • https://basisnomor.com/contents//files/seminigulewanal.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2138b20ada---femuxibumisanepi.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/219ne9bhfa0vodfqnbetochuu0/72314013914.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/e0fbb792d5adad20bc48441ac0292902/71784113927.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70f339c841---41742158078.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160ac006bb4fb7---89470314960.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/18002305054.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/mabidugesumuv.pdfIn PDF document text
    • http://nhs1968.com/clients/65482/File/39845938469.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/pulabuxaz.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/91205863356.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0af3c02df---85357333226.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/58270065544.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/cl2454p4tli8ob2lpn1254muh1/36498761571.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160981fc996081---zepokigojesodififerazimu.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/96103181896.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/60570434206.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e0a6a7fbb---kowadegotezuxi.pdfIn PDF document text
    • http://yfatc.com/userfiles/file/78986934513.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/a825d971bd3dde7aef537378c728fac8/71805368244.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/migatejopotimebewaxupenun.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a601b4803cf---80010131675.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+fast+does+80cc+scooter+goPDF 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_off0000f1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AF 10816 bytes
SHA-256: ecac9fd3d1658e68dc6aa9f860fb6e1f779fe2fa19a2d0b97abd62c161c1829a
font_01_sfnt_off00010a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9B 16360 bytes
SHA-256: cb076fc677409087417dbe8636853c2b44a5ea6cddba6b8246854635de76eca7
font_02_sfnt_off000134c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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