Malicious PDF — malware analysis report

Static analysis result for SHA-256 b463e00b53b1c90c…

MALICIOUS

PDF

84.8 KB Created: 2021-09-01 22:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 47c08c837bfa46c3a33bfac51c9c3401 SHA-1: 2c2eb9c78dc45e5a04e6f4cd177024e70292c196 SHA-256: b463e00b53b1c90ce418de2bd820743ac4b24cb763de1478d4136fb1e493b2dd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/uplcv?utm_term=taxiwala+movie+download+in+madrasrockers PDF link annotation
    • http://open.ua/uploads/ckeditor/files/43126862973.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/6g00cdrtlodufgschl5q4amj8h/topedugobikejifabugisun.pdfIn PDF document text
    • http://nwhouse.ru/uploads/file/92620689519.pdfIn PDF document text
    • http://msiutilities.biz/documents/fesejup.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844927d85de---55390834080.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5b23b3dae---13139873088.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607423110580e---66916057140.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/b02dcefb5f623dd3844d69fbe3f5b8ac/79310843884.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/311f289a6290773f4d6ac03b026bc4c1/84776790739.pdfIn PDF document text
    • https://soechi.com/userfiles/file/duvukisesajogawo.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ci49bp021fjmeepf76nj4er5m0/5368700462.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e867428b6---selafiterixifet.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d172f07e9a---jejuvetotigelomaxipa.pdfIn PDF document text
    • https://schmitz.cz/res/file/xedom.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/62118395895.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/lilopusejesa.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/86627960235.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ucijl8gph6gd42gbq0tadsjlbm/wevar.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7e7a00123---nikagewapelimo.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/88048798635.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109656a340cc---99832924593.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/22u8tigagv4cf3clcttuh7pb36/75126856342.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_off0000e806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE806 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10018 17256 bytes
SHA-256: 7edd18aa589f8170a6ea05d14e687ad2088b9f3162f833e817deb5c0bce6cb22
font_02_sfnt_off00012cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDB 10744 bytes
SHA-256: d0be264069332134512efe1bcd95fc304a4d0cdc002072bc763e55aca6de566b

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