Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4b15c1936063b9…

MALICIOUS

PDF

74.4 KB Created: 2021-09-12 16:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3faaf574582d85d2e912ce305d764a0b SHA-1: 2a8dde647619303e388a5ace3f5ecfb136e0363e SHA-256: 9e4b15c1936063b9d73fe72fa5009dbd125558f978f3640d2f8c83a00a121244
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification strongly suggest malicious intent, likely for phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://beytarimcilik.com/admin/editor_resim/file/40164748907.pdf In PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/ubi578p7c10frnp1gho0b83lr9/verewurivojezuvasijidap.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/13582588625.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d59d7de8f4---72195401021.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/12969913000.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/kiwafejikupivalaj.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/78787008386.pdfIn PDF document text
    • http://tetrafluoro.com/upload/files/52105813567.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/zupozupasaluwaxeriz.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/lafixaguxagojitos.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7e398f239---pexodazafasosivarobezezib.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c70c7f7ee---47039754134.pdfIn PDF document text
    • http://konberdbio.com/upload/files/10003592690.pdfIn PDF document text
    • https://sevenhillsgroup.net/ckfinder/userfiles/files/61310816198.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/ea926f9fb5a06e2cce44e81299a07a30/jokejip.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/xupebumes.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/81330999233.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/jinov.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/dukidigofevoresukuwar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=drive+for+speed+simulator+apk+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_off0000bae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F5 18280 bytes
SHA-256: afa2000c0b7170379491c72d1aeae98bf710d0e95a0fd48d4684c9b9f6c51d22
font_02_sfnt_off00010255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10255 11004 bytes
SHA-256: e658e9391007f92325009a0696efb64e91839ef7737e630577ad9d6bb98ea90d