Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef1c7387076d89b…

MALICIOUS

PDF

97.1 KB Created: 2021-09-07 09:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 07a7411c038454ddf696787de4e094de SHA-1: 7b8fb29f6569f10a5607091b2180a0271ef7c65d SHA-256: aef1c7387076d89b896a3c1cb7e4ae14374c1e48d53f92bb1d862c35870480f0
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads, suggesting a link farm or redirection mechanism. The primary purpose appears to be directing users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/3pnarma6e8gck0iuin1c05j9uo/52231782334.pdf In PDF document text
    • https://sport-jicin.cz/dokumenty/nofovunufojoraxul.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2588c6231a---gegag.pdfIn PDF document text
    • http://venturahigh1967.com/clients/40640/File/gowedava.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/66158735974.pdfIn PDF document text
    • https://morabia.fi/images/file/jebazoxofowujetu.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/67557252172.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/4an50op7fhl8i40afsfjpl8p5a/63072573965.pdfIn PDF document text
    • https://clinicamanila.com/ckfinder/userfiles/files/soviketigojo.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/66f843c945f58db912e5a589ffd44de7/81654842285.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/lewubazivilufe.pdfIn PDF document text
    • https://ferropula.hr/files/vojodapozuteduwudutoreriw.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/62096594659.pdfIn PDF document text
    • http://diacritic.org/travel/app/webroot/img/files/14305006056.pdfIn PDF document text
    • https://hlj-vibration.com/uploads/image/20210831/files/20210831145815.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a952926b588---74539207590.pdfIn PDF document text
    • http://umiyawoodworks.com/fckdb/userfiles/file/geximum.pdfIn PDF document text
    • http://www.s-prom.si/fileupload/file/bipamekalafumopafux.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/48853225640.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/6308c520724c01b4c790c03c8ac8de93/tijus.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/7420368760b9ad6f6ce04061a27e7811/foloxexaguwolu.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/b8adfe83aae9b0dcc8c5ee36fa2bdfc9/47900973140.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/1ftecuvmch04d993t3flpn3vt3/juxapononiguwamuwotuv.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/suwidu.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c556060ae00---vukesopone.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=positron+annihilation+lifetime+spectroscopy+pdfPDF 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_off0001140a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140A 18988 bytes
SHA-256: 230e96649d28dc110fac46fbdeff0d3d1eaba884728f09427ac797b80d8df1a5
font_01_sfnt_off000144df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CF6 11000 bytes
SHA-256: 9c5ba8f5c8fd4d6c63cfd21825041d8e2f2ee458ba9c4dc2b1d5f894feec8ea8

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