Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de441a4ea94225c…

MALICIOUS

PDF

79.2 KB Created: 2021-09-02 21:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f09711930d4cd3257ad9022e8330129f SHA-1: bdf7eda980359eb1bf7c95d22a1c6bdcfe2ef677 SHA-256: 3de441a4ea94225cdcfc3c07246e5982f9a50ef5c283ac1620551a1e06ef3fa6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised WordPress sites, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9f438aef8---novitivozapijomisori.pdf In PDF document text
    • http://jlm-kg.com/uploads/file/vatapikij.pdfIn PDF document text
    • http://rotang.net/userfiles/file/73943154189.pdfIn PDF document text
    • http://panel2conso.com/userfiles/file/73827116291.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/88592025405.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d34cb00f2e2---36648773333.pdfIn PDF document text
    • http://gtshotel.it/images/file/bozudapolo.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/30708660616.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/24121918931.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/39730164485.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/88207847549.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/4e97d953a1f6599dbad644c15803c7f3/rinukuwizuvuxubezamobomat.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b393e3410f1---83678399474.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/siwitexakovubasezanodat.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755c6646bf1---20719998961.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/89215973581.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/88221330738.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/dabok.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/s606c7lib746d0he6ivkm0l764/wupidosakenumefenozeno.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/fibomilamasunize.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/61665354282.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/45724427080.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=greenworks+16+chainsaw+manualPDF 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_off0000d3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD8 10932 bytes
SHA-256: 0ec1b1f317d3b4a7b030efdf1c2fccac7992d061e69a0b5df3ba29c3b25b36ee
font_02_sfnt_off00010518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10518 16268 bytes
SHA-256: 4f93df598d07acbbe8a341ddf911c1e0ae46b0d757b87bcdfd027637db141312

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