Malicious PDF — malware analysis report

Static analysis result for SHA-256 789363025bb1b827…

MALICIOUS

PDF

81.4 KB Created: 2021-09-20 11:35:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f1fa00101d324518e81266cb2a4c6e92 SHA-1: cb5810dc11eab82c6b8865ed046244c337b12b23 SHA-256: 789363025bb1b827bdd3456d421cf997d1518bf4819bd2647c82535085317da5
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple disposable domains and compromised CMS upload storage, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF's structure and embedded URLs suggest it's intended to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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
  • 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://canhtoanland.com/upload/files/58416711106.pdf
    • http://baigeleather.com/userfiles/file/43298577746.pdf
    • https://beautifulhairstore.com/upload/files/zajofofisofemepubasezu.pdf
    • http://sipsak.nl/userfiles/file/88885717756.pdf
    • http://ferien-in-zahren.de/images/file/sasega.pdf
    • https://store-connector.com/_upload_bilder/_filemanager/file/mutimodozixagutokes.pdf
    • http://banlinhkienlaptop.com/userfiles/file/muduxares.pdf
    • http://rm-centr.ru/uploads/file/71793218149.pdf
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/18269040734.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1613b519f62c9c---duzefivepalavuviwipekida.pdf
    • http://ipayon.com/root/FCKeditor/file/63589740958.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143caacd0fd9---pezidi.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/1ea543cbac25570d2b6fce0756e1d642/garirewiwu.pdf
    • http://jfhcoaching.nl/userfiles/files/mudekekazekoxeka.pdf
    • http://satyamtracparts.com/userfiles/file/324430451.pdf
    • http://vouchertiket.com/airplane/ckeditor/uploads/files/buluwujodeluwoxipamele.pdf
    • http://flightshop.jp/images/blog/file/74860304613.pdf
    • http://navigator-nsk.ru/userfiles/file/xujuxiguwataj.pdf
    • https://nghiepvu.udicmanpower.vn/uploads/news_file/tofejegozazu.pdf
    • http://ledseoul.com/userData/board/file/kiresefugakopetobuvenif.pdf
    • http://mq-water.net/upload/xovepadof.pdf
    • http://bradzo-ep.com/uploads/files/wizuwosefefonokenoleduzer.pdf
    • http://autosoftware.company/autoresponders_images/files/sategonesaborabemo.pdf
    • http://criminisiepartners.it/userfiles/files/wubelesomanifoxofi.pdf
    • http://mondoacquapiscine.com/userfiles/files/lelinolixijim.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=bike+rivals+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbec.bin
19931263580bb82cdd877fdcef335f03dcc1a21bd6b9d80f129432cc894afbdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEC 17260 bytes
font_01_sfnt_off000108a6.bin
1c04dabd0c453f6e13db10bf241d462aadd70d245249e32f8bb0cce1eb47c941		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108A6 10440 bytes
font_02_sfnt_off0001207d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1207D 16792 bytes

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