Malicious PDF — malware analysis report

Static analysis result for SHA-256 59988a1cdf6c7d7a…

MALICIOUS

PDF

89.4 KB Created: 2021-08-13 06:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a4667f7f79366c6566843a441f2f7f4d SHA-1: 278f1527bf662fb44a6436d491cb898abffeba20 SHA-256: 59988a1cdf6c7d7ad95b477b824fb15fe8a26810d484d4abc203f96defcb673e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous other PDF files hosted on compromised WordPress sites and disposable domains. The embedded URLs suggest a phishing or malware distribution scheme, likely attempting to lure users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://preprodpcb.com/userfiles/files/watalebewinofaved.pdf In PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/42fc39ab2c723b88dda8aea3ed8998fb/21282768684.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/7b187d90f63718e3309e21c9075f9a59/ketatitikenaveveguvumovir.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/91124057815.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a225431a4fe---derabeminaluvupu.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/55620168647.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e8b329e38---nebatupudidoba.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/96414475557.pdfIn PDF document text
    • https://myhoteltrip.com/userfiles/file/xosepomimowetitunuba.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/0d35f631a0adebd260c87c7f0f4547be/29388930608.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/zinoz.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/rp1r57mcpgd7iccgimq2phgvci/82380701393.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a43c04337a1---nenarusizogezer.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/d15d423831d79c3193a787fe8683872d/dobovedajag.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/lunegepidalijazinitav.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/33289581102.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/tawubujeniwotavidanokog.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/zowijetuw.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf3b20fc3c---76774985628.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/nexezajizuwozisetora.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1609a35c63d92f---zopufowoderipawukaseso.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/60432451677.pdfIn PDF document text
    • http://chipgene.com/image/files/20210726_174854.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/404de41358fdc401b73978a629b8f67d/sifumibunuxo.pdfIn PDF document text
    • http://gibeaufamily.com/clients/870383/File/69994379594.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+download+spotify+on+chromebookPDF 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_off0000f8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F9 11308 bytes
SHA-256: c18d726ec49cdc8f05113329c76e888be8fa294b31c84beec9e97ee2dbdfdfd3
font_01_sfnt_off0001132c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3E 17388 bytes
SHA-256: 4cb373621ce5e82bc9c193b86a5eceefbbe76677c0bc731da9f19b3ee02f5174

Open this report in the interactive analyzer, or submit your own file for analysis.