Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f8dd000bbec79b…

MALICIOUS

PDF

81.5 KB Created: 2021-09-12 03:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4271ef41a20549f5a66463d8a83585c7 SHA-1: d1d23ef6f45fde39a5ee547887575c703b234b84 SHA-256: 63f8dd000bbec79b43338d9cba358367e136a33012a40b24f1b47e40d7b8c7e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple compromised CMS upload links reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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 http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/07hq080koqr4omj7j6i1ao00l7/56158131723.pdf In PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/juvuloxogewenekevoweve.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/nizapokujoleguwok.pdfIn PDF document text
    • https://epiphanych.com/images/file/bezexapanux.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613602630bd08---29911113159.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/16a7e9daf9e7fe2195c1c4f7dae3479f/89963860684.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/liraserolisararapemeg.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/wugulujelulutozamum.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/taruduvuselatur.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/da66ef6fb70f05766439f46dfa7ded86/vixixifuravizonikojijon.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136dad76c128---9697511550.pdfIn PDF document text
    • https://kildevangen.dk/files/sizimaregufamid.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/wipaxexipotunekobukuwabol.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/cb45371aff24454601e2657f637eb19c/funanejutivobesu.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210902205424.pdfIn PDF document text
    • http://gapp.fr/medias/files/motozijimowakimutabopuka.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387d5347726---40062541944.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/jezamujesupotininuko.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/40964112672.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/zizesofazazojomiwipat.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/xagifurefifadewulako.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/kopowu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=mammoth+locations+skyrimPDF 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_off0000db02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB02 17612 bytes
SHA-256: 3e0f01d94ef38455a090a0530177078824bb0888d2e0128805a1d365d3f7dbe2
font_01_sfnt_off0001086d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086D 10564 bytes
SHA-256: b5d8230c2fb88e4423cf1af8cb7a7bed71c968d2e46f95a0bac880940e95bdef
font_02_sfnt_off00012058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12058 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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