Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d21fc40600422e8…

MALICIOUS

PDF

85.8 KB Created: 2021-09-15 14:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 422e7574d54f41bb199c4ce71790404d SHA-1: 4e9c988833109c029ae9624e3457b8b283a8213f SHA-256: 3d21fc40600422e8e4e02d1444c41667a3e8647ac987db3fa4e166dbdd5c6b6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were extracted, the embedded URLs are indicative of a redirection chain designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8531

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://alnahamgroup.com/userfiles/file/widasilebifurubaradisova.pdf In PDF document text
    • http://3dsami.org/uploadfilefiles/rebegun.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/vefedabibedifa.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/3302079b30d84b7ead498f66ff7361e9/mojeborixewipezukalezi.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161410ef350cc1---difuvidegapumi.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/63719459584.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/21341256050.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/95979e17db7d5fc1209706856bc17f67/29069033528.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/28276201658.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/gixodudokudigazuf.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/mixavetanuvomuzuk.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8e6d8be3e---51713435200.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/e6f530a831eaa6027132e6b632cc647e/19622052640.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/d4vjeva1dr43f6tbvrsji6gbql/gamojurawevunamagila.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16140f584a8ce1---64849951001.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/xejowuwepidedilimijadeg.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/numofarobafi.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/79373434780.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614029067d150---devilinurobajetovoxizedo.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140247b38bf7---xasifarumegigin.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/48020997795.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/14077289732.pdfIn PDF document text
    • http://raczcsalad.hu/files/36311315073.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613546d456dda---77030792302.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/19139834968.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=andy+emulator+2020PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11261 10588 bytes
SHA-256: b533875895b021b0f09f2146b87292c102cf69299ad82207d1d1f13b4cf7d0a3
font_02_sfnt_off00012aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA2 17536 bytes
SHA-256: 5445b0bc354486ede0b91c3946a042012b63534bbe0b00468d3d4da892ae8775

Open this report in the interactive analyzer, or submit your own file for analysis.