Malicious PDF — malware analysis report

Static analysis result for SHA-256 f649378b3b69aed8…

MALICIOUS

PDF

82.0 KB Created: 2021-09-05 06:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ba662ef092a389eba5c5904f27f80994 SHA-1: b0463604efa0bf65d17a3ba3584737e16f6317a5 SHA-256: f649378b3b69aed82d6a97be18792ce76e12d8299dfb89bdc16ff2d9461e4590
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites and disposable domains, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were directly extracted, the structure and URL patterns are consistent with a phishing lure designed to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://samoinstitute.mn/uploads/assets/file/49445599794.pdf In PDF document text
    • https://smartcirclegroup.com/userfiles/file/46755256491.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/471071437.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/31fa64142c3a775f77a7492fd64c69cb/90041972867.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/020159258376.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/refalurikexaxizujefumovo.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/detevegadiwa.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/pttj499r80bokb89kj03h8btb3/44501491979.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/bd90c2fdf423d4944c9562d70db6fdf2/letofawuwazobapom.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/leponur.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c6765cee267---vejofajepuvavenane.pdfPDF link annotation
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd5a794045---13065611019.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734d7a507aa---59098683164.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f68c329eb57---11124900309.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-08-07/210807055653293383ocrbzrgshzha.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609329728b8cf---37103348205.pdfIn PDF document text
    • http://larben.cz/media/images/upload/file/29945508469.pdfIn PDF document text
    • http://hsse.cl/files/59703407592.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608493c27b3d1---91647649004.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/2692cb0ce249fb129b7e278cb1318c42/61917202460.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/kigezuxekej.pdfIn PDF document text
    • http://devison-matras.com/upload/file/82912837925.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/gujusotifu.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/34626656021.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=entrepreneurship+development+skills+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_off0000dc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC30 10840 bytes
SHA-256: d917d56ab454a1bf3f1a677a48ed8aac2aa205966b9d77e5327274102c6bdbae
font_01_sfnt_off0000f4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0B 17704 bytes
SHA-256: 7b3a3ac4be28cabb6951cd5e0e993313a3a8931ae054fe67ba123dbc7752b4ec

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