Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61200e5394d46ef…

MALICIOUS

PDF

87.0 KB Created: 2021-10-08 01:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 8c1361d5a8a4c3552db199f1c2bc79c1 SHA-1: 75c254dbe021c397c2ed88df7c7d2dc4d73792e9 SHA-256: e61200e5394d46ef679e4dc6f394e2847f43e0216b05eb512463c75f5c168b87
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to numerous disposable domains, and contains urgency lures. While no scripts were directly extracted, the PDF structure and URL patterns suggest it is designed to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.autopsrus.com/ckfinder/userfiles/files/lizabapoxusuzimetapexanev.pdf In PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/92130852695.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/sudebitigirupasuruti.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/sugotapevosavisin.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/logubasojas.pdfIn PDF document text
    • https://asiastudy.in/ckfinder/userfiles/files/44564831572.pdfIn PDF document text
    • http://brenderup.ro/mm/file/banaguxemesexapolene.pdfIn PDF document text
    • http://sportsclinicwest.ie/media/contents/file/44055916636.pdfIn PDF document text
    • http://leguido.net/files/nusekoxopozisufovu.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/xinikimobudunamopaxo.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68676836141.pdfIn PDF document text
    • https://kimcert.net/E/file/53683569422.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/77067700768.pdfIn PDF document text
    • http://festacreativita.org/userfiles/file/41973656823.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210901_A3B192FC19295741.pdfIn PDF document text
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/vefopexixapa.pdfIn PDF document text
    • http://clerus.hu/files/file/pemebabetoxirabaxevik.pdfIn PDF document text
    • http://fuku-zou.com/userfiles/file/94971663156.pdfIn PDF document text
    • http://rbmtechnik.pl/userfiles/file/8635882121.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/0c2c93edb682df7fe5c9c1c70aa7d2c1/60617728578.pdfIn PDF document text
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/zukuminukapivez.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/cac9c2fa4a46f8d9363c63350c7cbe98/87025145075.pdfIn PDF document text
    • https://weishinclinic.com/uploads/files/202110051552253806.pdfIn PDF document text
    • http://195exim.com/datas/files/49338898990.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/26311251348.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=stem+capstone+project+examples+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000e7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DD 20096 bytes
SHA-256: c7982d0d67f05fac5caa682f36eedbf37022e26c1bbf193c9d6c338dbc5561ad
font_01_sfnt_off00011c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C51 10996 bytes
SHA-256: eb8da45b375383ce9a951b38efcb355483e362897141f638eeee2b4dd7c9d536
font_02_sfnt_off000135e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1