Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc23113314a9c475…

MALICIOUS

PDF

81.8 KB Created: 2021-08-02 14:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 5f0f333d234a449afa71f89c35abcf35 SHA-1: f90872097e4e9aa5dff9a995b9b481d424ea743c SHA-256: cc23113314a9c475bc8852d73181652c45b800e14737537534317546a5c39502
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6314

Heuristics 5

  • 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
  • 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://sunarchegypt.com/userfiles/file/rirefoxiranodapikuxoz.pdf In PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/5508012f43a3ee6ddf7f73a765f86b2e/16645457291.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/ecff7d9c2c84a8b5b525fc9b73f78a90/wewefotifakapume.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160710848a1792---40479664662.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/rinenonetimevi.pdfIn PDF document text
    • http://texmet.pl/userimages/file/39406156871.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080fc7b4b580---ranagoxexibela.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/53627745956.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16091749264170---49280860088.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/ebe87c5aa1620666e55e8c0a75442080/tijavinabopunilukopa.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/7029827868.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/fakisaxufasoluzakukirawa.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f178d3e4da---lutuwitevutoganawakez.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/43438838590.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/55739314046.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/53144582594.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/63bb9deffbcb4e6e25ac7c5ec4dec758/15950917983.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa12145dbf1---dukorisatunevenolalasew.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7c1ea54e---jodoxapunumako.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/13775729069.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/33889046843.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb0a6c302a---nodenuvimiwegegekojudele.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210628_4F9A2A2BE52CD141.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=what+is+mechanic+auto+electrical+and+electronicsPDF link annotation
    • 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_off0000f4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 10728 bytes
SHA-256: cdb93ba16e143bccfa0a41bcafa5e869d12d38c2d2e6e9f90eddf7fdd6b5b2c4
font_01_sfnt_off00010d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1