Malicious PDF — malware analysis report

Static analysis result for SHA-256 7218e034f7a34b35…

MALICIOUS

PDF

77.7 KB Created: 2021-09-02 23:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0289893764098d8fdbcd18c98292a2f4 SHA-1: bfed6e05aa100c8c41adf2db609195c6f8aca508 SHA-256: 7218e034f7a34b3596fda4d6fc517909a25fa8cad8ab3adcdc63b893ea2bb259
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan distribution attempt. It contains numerous links pointing to compromised WordPress sites, likely serving as a link farm to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics suggest the document's primary purpose is to redirect users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5732

Heuristics 5

  • 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
  • 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://wastran.ru/uplcv?utm_term=stop+opening+pdf+in+browser PDF link annotation
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f68a5d7a57d---zogawogenajijokeno.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2569a684a---80956069315.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/nbde5e5a0go9de96urc813l7j1/bajerevobironatulewuz.pdfIn PDF document text
    • http://i-dron.cz/data/file/zofodurobozozanubug.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/1f6d9dd6b9a40f32bb0cad44153ab24e/37630733066.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/69156956309.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a275ba5860---laguzujoj.pdfIn PDF document text
    • http://tuhs1970.com/clients/a/ac/acc339db084e87cdfae31a76a6c96f1c/File/sapexuvozitibaga.pdfIn PDF document text
    • https://psychotherapie-coeppicus.ch/userfiles/files/52036741885.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/34386598489.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076b90bc00fa---27460841811.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/78413330650.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cffd6c3c89---satoxepurijozuvotuzal.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/24503122716.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/45i5r6vth13am2ar74pq58cn4c/kebax.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcdd9cdc10---74201590484.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/wiratipefiwaloz.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ea7a32add76c0c6dc7043edfdde2f37/95471877815.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/3a53886da6dcde0ef291c3ec6d19c415/16511894870.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/nilugunurabaxamasawiv.pdfIn PDF document text
    • http://temple.mo/userfiles/file/gejepik.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB7 18564 bytes
SHA-256: f3d1002da36b4cd353282c5f2e81d56fd771e4075e3783e93d33b1355308adbc
font_01_sfnt_off00010def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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