Malicious PDF — malware analysis report

Static analysis result for SHA-256 3285f90898f3013a…

MALICIOUS

PDF

79.8 KB Created: 2021-07-06 12:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f0a9c8d60b4498fb4dcb69b3b3d9a868 SHA-1: d339515dfbe0dab200009062262a6e27ef2087b5 SHA-256: 3285f90898f3013a2357b203218d65312e3ea1fb3f2da46b76ec283be9b591b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm for phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://garglob.ru/uplcv?utm_term=the+ant+and+the+dove+story+with+pictures+pdf PDF link annotation
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b0382b4c7---94496066268.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/46560708223.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/2d6da7a069d6fc64a57f37c1ac2beef7/dulavuzemekibeboso.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b3007b085bc---83214608471.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/a1f0d24f37a98005046e5e7dd72fc835/15141525699.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/2048b6b0d41af09cf6fd265850b42dca/wixififumisur.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/hp7c1g9nqpjra4f1rqgi2cf1gu/papenopobaguweriwaganafox.pdfIn PDF document text
    • http://vinmexindia.com/uploads/93360322148.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d257f21468a---lonavi.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/9d765daf922dd52067dfe5f0566a4a58/47756799425.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d6be6d43fb6---bewabawafiw.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/fescqsg68nlomjdug8c3tq5e5l/xitevalemisek.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/wuwoxivukuxi.pdfIn PDF document text
    • http://momsystem.ru/public/file/bizaguzevuraj.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/44735615502.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fea4b6bfa6---77180248676.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/691c4f8eb706ac235dac473fab6b3eff/xudixazutalo.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cb9d759d5---zofatamowuburuzikuligo.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077637c345e0---wotaloza.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/nikukexofapud.pdfIn PDF document text
    • http://okwecare.com/usr/userfiles/files/tuzeri.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/xezuvuta.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_off0000d471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD471 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 11000 bytes
SHA-256: e578a7ee2b80748fa57c945c6cba48073ccdfd51adf32e3c2efa35cef9791b4d
font_02_sfnt_off00010620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10620 16920 bytes
SHA-256: cd06aecd5bdd1922c5c8b90b1cbf195175fee42a7e7e03e24f1cd886e90199b9

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