Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f74903953cb27a2…

MALICIOUS

PDF

67.8 KB Created: 2021-09-03 18:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ace88e9951270075684124ae79eb9ffb SHA-1: 6f4fbeefd1d8d29203f8668d93081ff1489c8a34 SHA-256: 2f74903953cb27a22adb545305bb5dceed8b948e3dec5dca03bbc148abf823e6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a link farm designed to redirect users to malicious content, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6961

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://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/3a7c0f7dce3279fd25e337203a87e7b6/wasukefojidefuduzonenuwit.pdf In PDF document text
    • http://forter.vn/hinhanh/file/61286331683.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/gutetek.pdfIn PDF document text
    • https://genia-groupe.fr/images/files/81792570565.pdfIn PDF document text
    • http://liily.jp/upload/file/20210722135222.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/48c0b8fc14c7adb5061bf9fcf4b7dd0f/ruzirenajipadejegunoju.pdfIn PDF document text
    • http://bakkervoorwinde.nl/app/webroot/files/ckeditor_files/files/xojelodujepukenanomorana.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/3641156530.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/e94971f157e75e622c755d6fa1bb3581/kozegorev.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d66792315f---vodozapirevezut.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/sesizik.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/5277983833.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/sodumagavajaka.pdfIn PDF document text
    • http://tomorrowhubs.com/upload/users/files/puriruma.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/rowotenod.pdfIn PDF document text
    • http://allasclub.com/campannas/file/ritujedavinibe.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608113303dfb7---55658726410.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/jupawojotawavapisan.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/fa93a9327f7534f795a6f31649335b3b/68246069647.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/00c5c4d69f7baebb98f1ad32e07937b1/3861885204.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611ddff96b45a---71233751119.pdfIn PDF document text
    • http://hi-techfiber.com/userfiles/file/90068794268.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/vusezomiwekopumamew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=fundamentals+of+thermodynamics+wiley+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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