Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3facb71a20998f2…

MALICIOUS

PDF

75.3 KB Created: 2021-09-01 10:55:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 745efe919bf62b9757d9fdb9a2c03a92 SHA-1: 1a7852554a86c8e68b169e8e56d3619bf9c2f72b SHA-256: f3facb71a20998f2074184ead5d210ba3c48caf351963fffb12ebe624229f918
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate it functions as a link farm, with a high ML classifier score and ClamAV detection confirming malicious intent. The primary goal appears to be directing users to potentially malicious or phishing content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/1934c0701246df40f6bd0b13d15da978/togurazasudamel.pdf In PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714735569c3---92068435690.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9dfd87198---15246616888.pdfIn PDF document text
    • http://lakesideterracecondo.com/clients/41361/File/1446583060.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/cu164p5puelj38r25dh00nmeaq/kedazorevomazez.pdfIn PDF document text
    • http://islandpointfl.com/userimages/nurajapivimudog.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/73997611758.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16126534b05563---62532631772.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e98v7tc2r6olr929sk54j2qmh3/86854470685.pdfIn PDF document text
    • https://majubesar.info/contents//files/60205020633.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e941dcfe2d---87607626010.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/1328cf1181d5055353f8317aa9a3ec9f/benadawuxukilujas.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/xewufajuxufizubapexez.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/503d3f0282ff1b8d7d5310e09a780720/fafukerusisodej.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/r7ge0gdho74c058cq5i3sd9tdi/pidijagowilafadepafele.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/91179579144.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/71447216833.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/jutizirobejexew.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/28054630797.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/lutofijififot.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/dubuparoban.pdfIn PDF document text
    • http://beiks.info/public/file/wifamewilefufapafutafagor.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/10557299340.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=comparatives+and+equativesPDF 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_off0000c249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC249 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA60 10848 bytes
SHA-256: 1a7a47482db25160c7f24741f160eec72c1f0972490c6a03cff7c5ccabad4a5d
font_02_sfnt_off0000f336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF336 17176 bytes
SHA-256: 081959bc5aa02ddf36aeb108ba1e20bd33bd47907db0a9b456e5c8862bc344f9

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