Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe1d3abfdfe61fe…

MALICIOUS

PDF

88.0 KB Created: 2021-08-25 07:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9c06e07be37e064c1c752a3708d65c04 SHA-1: 782d29c1b7424fc9371df40f45e3aff3d977cc8f SHA-256: ebe1d3abfdfe61fe483b2235c48530a2ad09ca0ba0b9d12daf2e3ac055d9657b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to potentially compromised WordPress sites or disposable domains, indicative of a link farm used for phishing or malware distribution. ClamAV detected this file as 'Pdf.Phishing.Trojan', and an ML classifier also flagged it as malicious. No scripts were extracted, but the structure suggests the primary goal is to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/faa30e9510e3307d94e24d583b2a90b2/pelimewarugunegawegawa.pdf In PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/lozunibexafirejusosabava.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/30789504372.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/wexijora.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd8ed57533---84487803479.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/rdjga2jr8a1kh2odjjntb4mci6/fefonozuvaxiwasuloba.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/12393b21835fa80e322013281adf7b38/73094153129.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/46663108633.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160d22bb71ae27---doxudawefilas.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cc5b27bc9---38879020350.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/wifenil.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/52532626602.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6ad5475de---torumofovul.pdfIn PDF document text
    • http://strefa-fitness.pl//fckeditor/editor/filemanager/connectors/phpplikifile/75939165702.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/rb1sngk9p55k9cls4fpvgtrs5i/satevuliluvowekusamav.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/sefifetosuvunu.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a5db974d51b---87892346168.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/zebifutusimomasesi.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cef238faa---tewibovemaguzamelabupiv.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16093c0836bc77---xavorowepuz.pdfIn PDF document text
    • http://bjjiffy.com/upload/beleruxeze.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/f22d18ba6e4be3535006580ce4c4dd27/tuvewazigunotu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=saxophone+is+a+brass+instrumentPDF 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_off0000f142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 18848 bytes
SHA-256: 9b6a2883edb1e945ca76d716560dd031dda8452906defcc6c85bb799f507538f
font_01_sfnt_off0001216d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13984 10888 bytes
SHA-256: a0ddea1ae1f3466267c36ccc871c948ecac9ca3cc026dcd95327a61fe1e4aba3

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