Malicious PDF — malware analysis report

Static analysis result for SHA-256 11207063f2e53efe…

MALICIOUS

PDF

181.3 KB Created: 2021-06-28 19:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6029f5b6788b96118e03148fa60dcbe7 SHA-1: d570bbbdabb84f0e84e1f44b2e9ed7f4795a6434 SHA-256: 11207063f2e53efe963098ea9627b8eaa6370b3a18d147e2f6e6fc8933441cc8
156 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress upload directories. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/326a0d436f8398a774b3c763811f1853/38207599601.pdf In PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/vava35kr148v49rv33i33jclrj/jufevejole.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02f02d744f---bekewimitejogaw.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/97v423kr7vak8q7luicfd94coi/savataburupapofumokipuno.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/faruvugaxetugupebuwovaviv.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/32387295584.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/f849fr2s4vvv5jbg6ia918idp9/xevafapokota.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099261755b45---tadamuvujobosuvapuzopokar.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/dusuvopifu.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/sebudunowaxefuzu.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/abdcc1232d7dd34c36093966cdd5aa03/93470097978.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/26746387598.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a0c575a4b---77693326420.pdfIn PDF document text
    • http://liddellgaryfamily.com/clients/863293/File/sarabepafitisuzogilabu.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094218b9f558---26069794489.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/829cukpj3a55vd4s4so5pepc97/4248955708.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/45491817257.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fb2c23c85---pikobuvotebefi.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088b956389b4---64263703918.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6f19bad6d---30617349717.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/22254959400.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823dfc3dccb---tepopimuwogibilufusab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=leadership+meaning+in+managementPDF 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_off000264b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x264B9 10628 bytes
SHA-256: e05fbe2a6e453ad133c49392e06be86db8b9bc38289819999dc8335d785e0ac7
font_01_sfnt_off00027c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27C8F 19256 bytes
SHA-256: 89f1370fc970730621cb9a1e2e6927da318665943528027fe7ea38080f5d4639
font_02_sfnt_off0002ae1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AE1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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