Malicious PDF — malware analysis report

Static analysis result for SHA-256 202ae67d2ff3ba0a…

MALICIOUS

PDF

78.2 KB Created: 2021-08-27 22:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 044566840fb9b2cb51823715fa26ff6a SHA-1: db863833a9aec3c99c07dc455167a240d24a1fdb SHA-256: 202ae67d2ff3ba0a8e0135453f23d4d0b5ca30730184d6441ca257379f523433
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, likely intended to lure users into downloading further malicious content or visiting phishing sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://catamma.ru/uplcv?utm_term=the+american+scholar+full+text PDF link annotation
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1be234104---bopoloxuzoresigigid.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/94609182523.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/xijinupo.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/5d92bfc52f827366856a9171218f07f5/46740366049.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/35813364473.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/nb9tjfi9uivnv7s3auvqs5vrn7/27749067858.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/niputojonurup.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/91272085133.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/59721497726.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160af0b6160d64---43095233236.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/6351224210.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/2o439g4a51qj5e4ve3s3g6ae6t/7656711610.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d8117b548---68127884145.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/jfufnbodsfb3ubtrfq9mdnkjdr/20066308828.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/97121646377.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/cdd64515cf0f6858165ba1449068a40b/zudafikezijumu.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16083b77e164f8---rujagobuzozukew.pdfIn PDF document text
    • http://bydnjl.com/userfiles/files/dizuxegirupope.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160776c5ac2274---rodizasonigedu.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/61992538381.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/410c7c1ff9dba63a7394e4649ec75c7c/68115116901.pdfIn PDF document text
    • https://uangraja.com/contents//files/takagulilugepexisutov.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9794f51a73---91026863540.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/3fee11cea2f38a5983a088fd098fb6c4/41032019246.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/75088276726.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_off0000d0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A7 16344 bytes
SHA-256: 49f5546a6e8964f189988d19610fd5f08762e5350daad0dfa8cab70bfc49dddd
font_01_sfnt_off0000fa8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8A 10768 bytes
SHA-256: 759a0fccc7e2c926eee7050b10f46e4531b3d101a301d300da6e37945b3b713b
font_02_sfnt_off00011327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11327 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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