Malicious PDF — malware analysis report

Static analysis result for SHA-256 f140bedcb1232df1…

MALICIOUS

PDF

78.0 KB Created: 2021-10-19 00:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d70510ee23f07eeab672eac374d646b5 SHA-1: 57dd31d6cb283038c5f635d2241634dede0787bd SHA-256: f140bedcb1232df1a45c059e909233fddc7cc4f2ee52ea52f630cdfdc4e65b01
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected by ClamAV as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress upload storage locations and disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3656

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 http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1615596d2315a0---43116144517.pdf In PDF document text
    • https://cqhuaan.myhost360.cn/upload/files/09-06-02-07-11-81.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/merufarukude.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/26700307007.pdfIn PDF document text
    • http://support-cmu.com/filedata/file/7148079312.pdfIn PDF document text
    • http://fohow77.ru/upload/file/77558805936.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/86753855015.pdfIn PDF document text
    • http://apartament-krokus.pl/userfiles/file/48618238204.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1614fc4b94f7e4---sekebebigozavizir.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/23133795404.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/97261247294.pdfIn PDF document text
    • https://oxfordjsr.com/userfiles/file/lexunatumoga.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/e2e73faee57ff2091f16cad3523b51d0/rujonew.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c14b331b27---40601955246.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/2n37cvatc3203sse3udtn1ep12/37846733842.pdfIn PDF document text
    • http://metallpress.info/files/mobowijumegeliniz.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/gozaxipasuwobuzadiv.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/29194fc84742e88a4ba4f5ae0f9e1e81/83218750710.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/58161668284.pdfIn PDF document text
    • https://soechi.id/userfiles/file/99344618488.pdfIn PDF document text
    • https://kaparatt.com/images/File/sifosejarafixoxirer.pdfIn PDF document text
    • https://ms02bet.com/contents/files/34629164889.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/45574869300.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/tgwjJlsMqHc/uplcv?utm_term=where+can+i+buy+a+dog+crate+for+cheapPDF 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_off0000edee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEE 11032 bytes
SHA-256: 7086e6977c382db9c1015b2428cd3aa5c4faf10b1be9146709965e9530708169
font_01_sfnt_off00010723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10723 17520 bytes
SHA-256: e476e875174700e5c4b27fdca39d7d1a1da55c8a908bd78422b7c17c2fc89bfc

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