Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabe9d648d482450…

MALICIOUS

PDF

69.7 KB Created: 2021-09-27 08:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3be2df4209c9a7c5dc6901f8c7557cab SHA-1: 63bb563be2baa0b8defdb566c26cb0c15be93151 SHA-256: cabe9d648d48245092baf9a614b6395b0762cbb8e9788c1dc0901bb513a827ea
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of multiple external URIs and the 'link farm' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://honghow.com/ckfinder/userfiles/files/76942431544.pdf In PDF document text
    • https://ontogepszerviz.hu/editor_up/99204167438.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/fujafotowa.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/14457697903.pdfIn PDF document text
    • https://indian-sped.szabgab.hu/fck_uploads/pdf/74872229756.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210918_681348A945B5BB07.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/16799762416.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/a0e6073651cafe6a21fea679669fc4f9/rasozivo.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vomjr9ce1h0jedg2lelciaigr4/wukafojojapudikugugivesa.pdfIn PDF document text
    • https://kawanmto.org/contents/files/gokivalani.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/kodevuvu.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/57998048044.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kujunugutimafimiropoku.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/28090223760.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/qpeuc8lhb1p3mml6h7sfd5bb64/kezir.pdfIn PDF document text
    • https://ocw.tw/uploads/files/4581013169.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/fapokanup.pdfIn PDF document text
    • http://truhlarstvi-strakonice.cz/files/file/jejanena.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/ruvazufo.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/tigufe.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/tasalitevotasifef.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613aed9b909c9---87693655037.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/39622865598.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=control+ipad+remotely+with+androidPDF 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_off0000b114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB114 15392 bytes
SHA-256: aa7bde27bab87290f95cb02727859249ab9df8e48d681aa772519acd0d473c40
font_01_sfnt_off0000d85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85F 10720 bytes
SHA-256: df8eecf0f789752a061673a5e13f3f71277da9f7ff5441f61298783e30519ff5
font_02_sfnt_off0000f0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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