Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea56e6b823ddf19…

MALICIOUS

PDF

71.0 KB Created: 2021-09-03 08:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9514cb1d0fab550c1372fb70e002ce47 SHA-1: c35d75584a0ce8b297acd4518f68355d29c5d1af SHA-256: 5ea56e6b823ddf19d8570b8a1214c51d596cd57fd5e50ec4928013f03edefbef
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and link farms points towards an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6715

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://pappteam.hu/userfiles/file/wafegifilalijavexudaloxi.pdf In PDF document text
    • https://chungcungoaigiao.net/uploads/files/tofadumabakezexupawaxa.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/580780c7a448c57ffc91a0c17fdaaf16/24542365066.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/60543299405.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/92468481032.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/53400825009.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/59638423713.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202107051118.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/60458793425.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608215cb57a10---xopubimutuviwomi.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/93389435961.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adaed655ece---xejixaxutox.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/zururuxegikul.pdfIn PDF document text
    • https://unosms.us/userfiles/file/jegusame.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/88062050998.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/39454794909.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/r32valail09f31mem8uevpjcg5/rubikivekufe.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/34507123385.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a15bde7a9a0---29968164749.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609665bde4eaf---21076965693.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/56cd85e06f8dc765b3c9e7f20030e024/81974342413.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a676c9a31d6---devek.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160766632cd6e6---91989012005.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/vomipojobobetofuwaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=discussion+starters+speaking+fluency+activities+for+advanced+esl%2Fefl+students+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_off0000e675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE675 11204 bytes
SHA-256: d6c1f761283ec31a5ccab20db360ce831c1e0e49c06ace5ad65cc45d9473675c

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