Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64c612eda97cc92…

MALICIOUS

PDF

69.8 KB Created: 2021-09-27 10:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5f97e5d829d93a22d2efc64de085ae4b SHA-1: e2236d4ab75f32bab605f097c0449bc66e641449 SHA-256: f64c612eda97cc92123ce32e9a43fff737b5dc1b891c6fdc3ffc66a686a5ad24
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to potentially compromised WordPress upload storage, suggesting an attempt to host malicious content or redirect users. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c273f3bb67---rodudukasom.pdf In PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16142c2276b460---fawisipiwidatejabafuvige.pdfIn PDF document text
    • https://simorgh.it/uploads/file/52194610677.pdfIn PDF document text
    • https://la-klamm.org/Files/files/surorixudamivujebemi.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/22381986898.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/97c6d3776d5777527c6dd63f0c274db9/pakamozu.pdfIn PDF document text
    • https://webmanagement.produse-electrice.ro/images/file/vixobamatuzabokadopas.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/20109087929.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/lizadatonasijibofogexer.pdfIn PDF document text
    • https://newcar-rental.com/uploads/files/202109262059135658.pdfIn PDF document text
    • http://indianapit.thriftstorewebsites.net/flash/indianapit.thriftstorewebsites.net/file/64077330254.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408f4984272---koraferis.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/lulekibopufixaz.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/dutazudenapetid.pdfIn PDF document text
    • http://tcyy88.com/userfiles/file/2021090404303773499.pdfIn PDF document text
    • https://truckforceone.eu/upload/editor/file/wezilewifubowofopino.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/54306258158.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/efac7cb4ac26afa2102be1a8f4d3c2e1/83978349519.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/rugamada.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/xapaviforokigoluvov.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/92559806187.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e308a0b4fc---65991966159.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=robin+williams+at+the+met+streamingPDF 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_off0000b1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F1 15152 bytes
SHA-256: dc8f0d823609c58eae25bd683b981eda1dea6b8663d7dadfc3609f7d98206f52
font_01_sfnt_off0000d84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84B 10824 bytes
SHA-256: 319d31151b9cf4c4828c4ef41c96f0bfc7df4a2f479d52765004d3274b4b7504
font_02_sfnt_off0000f127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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