Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2782dfa793cc525…

MALICIOUS

PDF

85.9 KB Created: 2021-09-13 15:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d2516591d0cb4963c329de53c5226251 SHA-1: f203eb6156aefe052049de76e2e271a2105387de SHA-256: f2782dfa793cc525c1b3fc0caf2e5fc5a5af36d047c512fb2e8fb7763089c4d7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to potentially compromised websites and disposable hosting, characteristic of a link farm used for phishing or malware distribution. The presence of external URIs and link farm indicators strongly suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://nomylo.ru/uplcv?utm_term=hill+climb+racing+2+an+1 PDF link annotation
    • http://solartgaleria.hu/images/file/69309918950.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16136a8ce60661---64997249000.pdfIn PDF document text
    • https://technoarc.net/userfiles/file/zuvotosizobuvujufesa.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/duxawibutolomef.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/dimagavajude.pdfIn PDF document text
    • https://giyimkent.formenemlak.com/upload/ckfinder/files/topagoxitega.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/a86b713ff07870ca86757d8a42e2cb61/46726480365.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/lebopugew.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/2f3fd77ee11ce696ecf2331f06ecfb92/gigimujopuwuk.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/aai34vfonfgii5cd8r1ughdte4/molazumaxavaxuni.pdfIn PDF document text
    • http://hitechdentalhouston.com/uploads/files/83063266228.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313509968bd---vapexisasesima.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/bidajugomirela.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/51752585502.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/66120015437.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210910205444.pdfIn PDF document text
    • http://apartmany.cucoriedka.sk/data/files/25258690704.pdfIn PDF document text
    • http://technocom.pl/editor/file/demalefixuwora.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/rizenewipidoge.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/95574733035.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/33472233661.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/raziralapunesezijeduvuwab.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/76549658321.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD311 25360 bytes
SHA-256: efb230a6ba8d626c4953c8a6fc6811991034678d22bceca0225132a1cb6f199c
font_01_sfnt_off000112a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A2 10360 bytes
SHA-256: 2aeff2993c438edf8c1664f9868ef706a78ed74ac1b10554cf82ec4352b6f7e5
font_02_sfnt_off000129ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EE 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_03_sfnt_off000131ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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