Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b909bd3edf9471…

MALICIOUS

PDF

85.3 KB Created: 2021-08-30 01:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 5734f0dd9bd1f69b15c4598e7fcf7689 SHA-1: 725a121e0413d68edd4a92044f834ee0e7ec82b2 SHA-256: f2b909bd3edf9471727f4ee47b6f090c17c01ca2171a45cc1b4781ff43a9cec7
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/d6d60beb0f89b4442b40e47ab7eb00da/48495640871.pdf In PDF document text
    • http://okwmd.com/upload/fckeditor/file/sevanetizove.pdfIn PDF document text
    • http://alhs1973.com/clients/64426/File/12092826875.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975b48604e0---xipapif.pdfIn PDF document text
    • https://ixiu-23.com/uploads//files/202108050948522867.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/kipafito.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/wubigarage.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/18614853345.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9385de5f0---joludok.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090c48b636ed---rolamogabevivetuzikom.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/92688bdc7892ee37ad442858f6f93ef8/ramanubukegojakezu.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/mozorinoj.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160842a938dc41---deguwaloburapikiwuta.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/23241434243.pdfIn PDF document text
    • http://allasclub.com/campannas/file/kizupep.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/49555040234.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/1a5ad9ab9c4c469fec4a68003b4801ca/37290486876.pdfIn PDF document text
    • http://mega.kz/media/upload/files/94506838524.pdfIn PDF document text
    • https://arslanemlak.com/E/file/In PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/20411412102.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/juponepipow.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8a5752c68---3915102707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=have+you+seek+amyPDF 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_off0000df1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1C 21624 bytes
SHA-256: c284cba04b80fed4c3abd10c4ac14c7947e1ac79802a20be930e3cabc5c638ad
font_01_sfnt_off000117f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13010 10192 bytes
SHA-256: 83a58c52b29a28d160812324061479856ed1a0d1874d40aa7caa7fa2bec1b0a5

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