Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcee8a7585cda46…

MALICIOUS

PDF

68.6 KB Created: 2021-09-22 10:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: aa49a9805e476ea800f48b23bf947aa5 SHA-1: b731687a7475ff26bf5193a2f7a65e112dff6088 SHA-256: fbcee8a7585cda467746bec7403d1667f1d85818561a1fcb7a591fa3dcf3e524
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm, suggesting a phishing or SEO abuse attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to potentially harmful content or exploit kits. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://shoreluxurylimos.com/userfiles/files/17807609325.pdf In PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gewavasiku.pdfIn PDF document text
    • http://popmetre.com/news/files/kitadimoluli.pdfIn PDF document text
    • http://zhihepvb.com/upload/ckimg/files/202109140345024858.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16144baf7942b1---xisije.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/mesedet.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/panam.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/tezafarinajezimawib.pdfIn PDF document text
    • http://nincity.de/inline/file/54776739386.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/6544511327.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/feradeximowe.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/76806519486.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/3576471286130f5bb42f13.pdfIn PDF document text
    • https://portalkucharski.pl/app/webroot/media/files/88174004136.pdfIn PDF document text
    • http://salespate.com/userfiles/file/sebidemitof.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/nibutekel.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/87120614753.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/27765528379.pdfIn PDF document text
    • http://fthyhs.com/resource/docContentImg/file/2021-09-07/a27a11075625c49181147a5f23ebc246.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/kurakobafowewage.pdfIn PDF document text
    • https://keongracun.org/contents/files/35112758459.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/71763711362.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/19424386306134f0c2d938a.pdfIn PDF document text
    • https://artbynela.com/uploads/file/32944284250.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=top+10+offlinePDF 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_off0000b044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB044 9960 bytes
SHA-256: eece5072a5270bd6d46f7171a16ada5f647c76d4ad95bcd43e88497b61fde82c
font_01_sfnt_off0000c65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000de6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6C 15252 bytes
SHA-256: 89189a46d141520dbb6d502a8bbab01c95eb6219c29b41eebf63e4b2c1017fcd