Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7bd9302a3f111c0…

MALICIOUS

PDF

92.2 KB Created: 2021-07-02 07:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a95ef22fdf4ba89e319938b2717dd1d8 SHA-1: b005e6d4afc3691f3a579df66730ecca7be57e7a SHA-256: f7bd9302a3f111c0ce28eac53aa7f7f3482600614886e9b6dcd4d7976b09afc4
156 Risk Score

Malware Insights

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

The file is a PDF that functions as a link farm, directing users to multiple compromised WordPress sites. These sites, in turn, host other PDF files, indicating a multi-stage distribution or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b0a0d99c7---jomalereku.pdf In PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/b7kl77d9heb7ngcm6e780fg8v6/86836092386.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b49b8eb1d3---35511790974.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a1be4e471---mizipen.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f10a79d504---458916120.pdfIn PDF document text
    • https://vestol.bg/files/file/62501027883.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/91df75531a14735df31b838d17cafcbd/2691094501.pdfIn PDF document text
    • https://beaszemin.com/files/tufesulixeguditu.pdfIn PDF document text
    • http://evansmedia.ca/userfiles/file/dejamomeselop.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/6cp51j7i1fa6mv311ebp3fll64/vezinokukezomil.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160957fb4793fd---38911559634.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c623286b6b5---fefunelinimixanopu.pdfIn PDF document text
    • http://rcot.by/pics/files/vekisipedatuwumabefuvef.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/70022614211.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210624143650.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/3959086705.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/ciinl9ov585qmpu634dmbpl7p4/jobunebar.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3d706eb3e---34585743294.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c41ec3a0a7---nepuganexitusitagojuturew.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/neboxibelojafiz.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3b4cda4ae---saparakirij.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/kelodiwajo.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/anjogor2icrlek29up0208grnt/sakutalo.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/kuludatinijabisezezopid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=principles+of+artificial+intelligence+pdfPDF 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_off000104a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A7 17024 bytes
SHA-256: 93219973db5fff7bfb140a4fbc1d18fef3b138f4724b51f4b58bcaa9ae1d0d69
font_01_sfnt_off0001307e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307E 10796 bytes
SHA-256: eb0f5db61efbfce9e515f7d8f78a0b63cf6f4aea2a09521ca89fd620e4b4cd11
font_02_sfnt_off00014940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14940 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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