Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce224ca8e8c6867…

MALICIOUS

PDF

96.5 KB Created: 2021-07-07 03:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c483fdeef2947bbefd492ffe7631f087 SHA-1: ec75840f8cd533da3f7e2a2ffb70b87efed4faa4 SHA-256: 7ce224ca8e8c6867cf2f19f6c868e0d15dcc6340c59ee247b16c07dd80bd8d88
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921420e809b---waboxol.pdf In PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/94359912809.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acafe0c2dce---57848435530.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/falun.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/22242b3dd6e3ab0d4486dc3c825ac055/fuzevo.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/60536741837.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/e292876aad8aa9efe9088d09006ae998/84824324616.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/81128302202.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160d251a14dddf---58266247715.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/sanofosifogajuvetujanani.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/15704926584.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/70687492918.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/21032637768.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160d57ca9b5bc7---gomodovekukolavo.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/wikunuwewibumiliwitora.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/e231f1613f1c5c284126ca49c6dd7606/78960382581.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/xefumesekijugofozuka.pdfIn PDF document text
    • http://com123.vn/uploads/file/deludolebeg.pdfIn PDF document text
    • http://adbuffalony.com/uploads/files/nezed.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/lipusokirugufifivupedika.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/1srfouv5j5msemdrllqdh2sv03/34995436980.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ra69fg02l5emppk3s27r3v9us1/notatu.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/47079100753.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc493d063e---20180313201.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16093a1695ad9f---zimepizobadefap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=westinghouse+pdr790s+manualPDF 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_off00011133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11133 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12945 18876 bytes
SHA-256: b1d24f61a4ad3088a8733efbff7e506af30ff2aeae58460fda8850bd2eca2cef
font_02_sfnt_off00015aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AA3 11272 bytes
SHA-256: c9d84e7a3c28e4c4cc2761c0e27e64dbea7bf7231faa600b376db8fd4655b6c2