Malicious PDF — malware analysis report

Static analysis result for SHA-256 a648e828e19f1daa…

MALICIOUS

PDF

62.5 KB Created: 2021-09-30 17:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b110dd4cc13dd6634723b6401aec3215 SHA-1: b5fbec810758439c8b8d909d34cf40e3535dba66 SHA-256: a648e828e19f1daafe6531ac0efc782a9a82582e218835f448cf63650a15a566
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to potentially malicious domains, and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on disposable hosting, suggesting an attempt to obscure the true destination or distribute a payload. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9142

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jcmimoveis.com/userfiles/file/21017793495.pdf In PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/76048545147.pdfIn PDF document text
    • http://dinobajka.pl/Upload/file/27374243760.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/zidelofosum.pdfIn PDF document text
    • http://dintainoodle.com/uploads/files/46629241620.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/13171696292.pdfIn PDF document text
    • http://jumpinfit.it/userfiles/files/lesuluzojogawidemeb.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/51138015985.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/5df9d65213dbc562f131793661309433/xinidedogoferemapedu.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/tiwem.pdfIn PDF document text
    • http://pokrowce-ochronne.pl/Upload/file/20695468049.pdfIn PDF document text
    • http://neo-net.info/giganet/files/file/nelabafipo.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210921_7734907007E2D7C1.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/83015118602.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/51781328973.pdfIn PDF document text
    • http://a2hgghk.handylover.com/upload/files/48144743801.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614cb78055636---nifurosuk.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210909070453.pdfIn PDF document text
    • http://chinalabware.ru/d/files/kevijub.pdfIn PDF document text
    • http://tiquital.com/documentos/file/80852572928.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/45319430243.pdfIn PDF document text
    • http://asvpp.fr/pdf/dusasupogikerizenipadewov.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/60513885755.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+reboot+ipad+without+power+buttonPDF 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_off0000bed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED9 10592 bytes
SHA-256: aa86dd8a6b5ec0c257691276fff8acb9ee12e5682511ab55a8e077904cf74b00

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