Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5dd8eec5c1b904…

MALICIOUS

PDF

74.6 KB Created: 2021-09-10 11:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 43b7703e312e721fc7c8e89b04dacf85 SHA-1: 6e79f5b2b122b2f155b6ee859feffb25c9f770cd SHA-256: be5dd8eec5c1b904338281a19217be01bfaf800ed7e5d98d81eaabf09a3ae3a1
124 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as Pdf.Phishing.Trojan. It contains multiple links to external websites, some of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of these links and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4752

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://rexant.by/upload/editor/files/remel.pdf In PDF document text
    • http://begues.mobi/userfiles/file/katojuwedixutuduso.pdfIn PDF document text
    • http://labuchedeberce.fr/userfiles/file/potafoxibidutuwupotider.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139b59aabf84---99340991645.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16138980fc881a---92905700940.pdfIn PDF document text
    • https://jetaime-shop.dvsportbg.com/files/3547561435.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/70019248238.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/gitorulukagasefusupidid.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/liwuregofumafusiguniwazaf.pdfIn PDF document text
    • https://fishboat.hr/files/78707876586.pdfIn PDF document text
    • http://lunaleo.pl/userfiles/file/zenamozalavaw.pdfIn PDF document text
    • http://internet-trade.eu/UserFiles/file/25641732769.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/vudizomupi.pdfIn PDF document text
    • http://ekmeta.lt/failai/file/tifutujifewimagimafumeris.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/letama.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/80390914888.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/59361526982.pdfIn PDF document text
    • https://revive.fashion/upload/files/vivemurozezumakazoziv.pdfIn PDF document text
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/27214263878.pdfIn PDF document text
    • http://portableandcool.com/files/files/kojoxojemuzedivan.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/68097058868.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a82c034e81---jijiwejowomejesox.pdfIn PDF document text
    • http://emeat.ru/var/files/34061223706.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=torque+pro+iosPDF 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_off0000f3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F4 10044 bytes
SHA-256: b305af30d4384e5e056eeb15c066e9aa6c47ec612fc9c3a95fa212d55bac73d8
font_01_sfnt_off00010a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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