Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b08f088c68feda…

MALICIOUS

PDF

70.9 KB Created: 2021-09-18 02:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 800957ff3033e53b9afca3308c49a491 SHA-1: bf05077708268bb224163da11ac53b35782b8b5f SHA-256: 12b08f088c68fedae1dff77ebeabf8d0969f773f05ed224f535e670e2d6cf7b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with phishing or malware distribution campaigns.

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://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f84fd4a456---nakadiwetaf.pdf In PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/fusimevupureted.pdfIn PDF document text
    • https://sainaudit.mn/File/16747728255.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/vanadolamisirizijizin.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/fazomudekasake.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/dojosalomedez.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/44283385872.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/ripujatanivojawoki.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/94108546452.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/92566593791.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/be27635aa3b018855f2f24f3b41b0d3b/17824105792.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/89843227798.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/33644690650.pdfIn PDF document text
    • https://birudongker.com/contents/files/54278755529.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/93479328979.pdfIn PDF document text
    • http://didula.ru/img/file/12303088644.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2be88883a---samutawupuladudup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=mad+zombie+mod+apkPDF 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_off0000b224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB224 10320 bytes
SHA-256: 729d57f79ff033f3637da411728c91ca01e3cfe7838bdc6a28474c7a0ec9e85e
font_01_sfnt_off0000c92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13F 18040 bytes
SHA-256: a74a6437658cb6720082374a541c693d5d11b21ac3835a4f47a73809031b2709

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