Malicious PDF — malware analysis report

Static analysis result for SHA-256 125f202e98b1cc4d…

MALICIOUS

PDF

86.4 KB Created: 2021-08-13 09:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 60bd3be4d2f78c8f2ad322603508e7ba SHA-1: 384340a56d9bd07bc1793b8549b7496af414f8d6 SHA-256: 125f202e98b1cc4da12285e6f15c1ef7991030205bf2f7a3d582532edcce1e68
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm, presenting numerous URLs that point to potentially compromised websites or disposable hosting. The presence of compromised CMS upload links suggests an attempt to host malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://belhasasecurity.com/userfiles/file/96490261524.pdf In PDF document text
    • http://epmresearch.org/userfiles/files/93161343862.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983e83e0408---21446845380.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16114b4d1dab6f---18736092554.pdfIn PDF document text
    • https://themalc.org/files/file/911924135.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/bdaca01837f0fa57de24f3dd83dcd21b/kubodujukuxivefinapomafif.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799c018b2c1---48920556079.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/votup.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-18/20210618163253835275.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/14906762420.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/3647a61bfb7bad1cea5a9374a7c45a9d/98948774010.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/mofosozimotaradolanok.pdfIn PDF document text
    • https://tavio.ru/files/file/45488421555.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/vejudolinezapurur.pdfIn PDF document text
    • http://dhf-china.com/d/files/xizoputemaj.pdfIn PDF document text
    • http://kotolantopeni.cz/file/jirulebolojazelodi.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/60ab1c85733a87db83b7300d2976d50c/21055130562.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606d35c786cff---69287942256.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/04c0ec3e78f021e3f7f0ef08c60cebe5/wozivixesumerezepajufeb.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/kujigarolixu.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/t2g1jigbhc88pbi74rqhshnuk3/ruzone.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/93734033171.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=vw+beetle+workshop+manual+downloadPDF 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_off0000efd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E6 16252 bytes
SHA-256: 5f25036dda703f2f5215454e99b9051db0c7bbcbb12ebdc1089970cc00bf5c5b
font_02_sfnt_off0001320f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320F 10952 bytes
SHA-256: 566367dbd1a61f0de8dc1366a2d73d8e4b21f4a9962674fb05fbd5b5041b4347

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