Malicious PDF — malware analysis report

Static analysis result for SHA-256 24fb2bba987afeac…

MALICIOUS

PDF

100.8 KB Created: 2021-09-01 13:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 482af3924eac59094f238b644e57b19c SHA-1: 74bc562974390f8072735ce588eaf04515dfb15c SHA-256: 24fb2bba987afeac200413c5c5779fe0bed34f4209c4491436385a307ac64d8e
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the presence of multiple suspicious URLs is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://mimpiindah2.com/contents//files/14654715634.pdf In PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/oorqhgrotvpqoete6dceeilh2j/44470842326.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/5776584bf4b8704ec47d5a9a3d7d331d/melosamitujoveguremapuf.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/wapimijokibawofedulageko.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072efa35497b---fexezida.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/27455933998.pdfIn PDF document text
    • http://pensacolahigh1964.com/clients/1/1d/1d652d7f5bd5fd2f3712913460b20393/File/23593671809.pdfIn PDF document text
    • https://ovalpolycoats.com/media/32551945462.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/27090296349.pdfIn PDF document text
    • https://groupburuemas2.com/contents//files/folapebunotefuvowirema.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/6pobspkvpff61bhlrr9toej12p/57496424783.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/sigag.pdfPDF link annotation
    • https://arte-salon.ru/upload_picture/wodelobupagekududufuvome.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/367382c1e57fd82398a9b697bebfff04/46388760892.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/c3aa849bd98adf637c60e75f18560a0d/9433476467.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e46b376c8---fovuno.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/c09a87d311d8ca43ceead19485ceee14/76839357871.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/gewenafodide.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/zerimerozipaxekeveta.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/mikonalanigimaxikal.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/795c240ae098e9212f369d4ee3954ab3/galozusemos.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/501444833.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d017430d7---suvejizimasomogib.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/76319427880.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=the+king%27s+avatar+movie+eng+subPDF 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_off0001120d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120D 10904 bytes
SHA-256: a18cc2c30fd003e9a01d95a8673ec68283d898508b4ddd038263a6d099b0dca9
font_01_sfnt_off00012b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B37 25864 bytes
SHA-256: de9d5eb6de137db20e1eaf341075746d7d2c05fe6a8ea1539a5900a0ba792917
font_02_sfnt_off00016d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1