Malicious PDF — malware analysis report

Static analysis result for SHA-256 86da8211afcdd341…

MALICIOUS

PDF

93.0 KB Created: 2021-08-13 20:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9dc0ac6d1301b892078b4b3f6af601c7 SHA-1: 8b6d5b5b6049592d1dee0d8c7346e3fb7d20b596 SHA-256: 86da8211afcdd341f15a6bae56f57023c3bdcdba920e3aed5b2f0ed147fff57d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://ketchas.ru/uplcv?utm_term=positive+parenting+solutions+toolbox PDF link annotation
    • http://lotusburbank.com/uploads/files/baxal.pdfIn PDF document text
    • http://954move.com/clients/4890/File/rawagategiruzuju.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112a76cdccf5---68673559788.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/96859483190.pdfIn PDF document text
    • http://beiks.info/public/file/3488504896.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/10d13146950e31abab66c57dad5b75c7/94195644578.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/82cd108902a13cdbabe5c4f5496abcb8/68513925808.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/acfg43ap8bdvbo0223u1rb5cn1/72639713489.pdfIn PDF document text
    • https://loctra.net/userfiles/file/92460956887.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/msuhv3c5u5k8e4ochgo35l7794/pemekudesufi.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/50e4e6c56c579487b00412fe9ba2c50e/25634299290.pdfIn PDF document text
    • http://sam-global.ch/files/file/96024131150.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/23183944736.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/pawaf.pdfIn PDF document text
    • http://sensi-leszno.pl/userfiles/file/rozowotugigivedixexu.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b85e67b64---77648404787.pdfIn PDF document text
    • http://jungam21.com/upfiles/file/1628760761.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/8882a71d0651a32ac1ef25f74892e502/papekix.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/eom6te6te42d4qji3u4veo7g42/4949420080.pdfIn PDF document text
    • https://kimansion.com/uploads/file/54334862973.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079b830e4a75---52347443773.pdfIn PDF document text
    • http://texasstatealphaxialumnae.com/clients/f/fe/fe72632f573fdc77cca6b85875c63e8a/File/16481564171.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/49c13cbd9314c3906318a16acf86479c/15798916718.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/1737cae1f56ca5becb64cb09f54771ae/fiminitixe.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/d528c1d2d40663d67d50768e06aba20d/56362534627.pdfIn PDF document text
    • 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_off000109a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A7 10836 bytes
SHA-256: 25d808d4dd496e1129851c822bfdfbfde11ca05623b4b10cbc79fd1b09e5eeab
font_01_sfnt_off000122a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB7 17180 bytes
SHA-256: 206a6d18b8202874750c4b9e00bc127d88fe6ebcd3ef35dda05490cb66e7048b

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