Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf0eedf6714544a…

MALICIOUS

PDF

84.1 KB Created: 2021-09-24 07:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 48d993b46c5a369900527aba483e03ce SHA-1: 0223a450cfb8adbe9fc6edd91fa59665fe5c84ea SHA-256: fcf0eedf6714544a8135cc37c7fe0a90f4210a01bdcae3100680a22bd86f853b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to domains that appear to be part of a link farm, suggesting a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and the presence of many external links are indicative of a malicious document designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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
  • 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://gamax-motor.cz/data/dokumenty/46911390425.pdf In PDF document text
    • http://clingac.com/d/files/lafov.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/14969561736.pdfIn PDF document text
    • https://gogreenonline.net/userfiles/image/fckeditor/file/pixawi.pdfIn PDF document text
    • https://dogodanang.vn/uploads/image/files/tekimomobunexosagamomexe.pdfIn PDF document text
    • https://trungtammatnamviet.vn/upload/files/diwafarafudilav.pdfIn PDF document text
    • https://laznia-radom.pl/userfiles/file/14277612005.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/fakavosu.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/30261548192.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365dae6da33---65174967376.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/zitewonusizojosugesu.pdfIn PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/gukoxobawel.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/99734638517.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/23907291868.pdfIn PDF document text
    • https://0800-707-808.com/upload/ckfinder_temp/files/20210901055353.pdfIn PDF document text
    • https://innotek.vn/uploads/news_file/66749556063.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/jozakon.pdfIn PDF document text
    • https://ontogepszerviz.hu/editor_up/lirebafo.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/gizofovatemopepiju.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/ganogaxatel.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210902_AE33CCFE4EAAC784.pdfIn PDF document text
    • http://jezirka-biobazeny.cz/UserFiles/File/72265579875.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613348f5cf605---7487034101.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/kodipapodepo.pdfIn PDF document text
    • http://suyogmaratha.com/editorimages/file/27156247101.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=things+in+nature+that+start+with+nPDF 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_off0000e394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE394 17976 bytes
SHA-256: c99be5eecb2239994f45a17b6d604849e3a0dbf1a4727bf52e47c5f9c0c5682e
font_01_sfnt_off0001129f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB6 10372 bytes
SHA-256: f381c95235755170f1f8128b9a5fda69d19e5e2fcb30383d0491ba3946b45b38