Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee3a368bdc167ec…

MALICIOUS

PDF

84.2 KB Created: 2021-06-30 08:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 93ac49651d22a027614e158a87a21aeb SHA-1: 3fb9b854ac481111515f143141fe2f5ae3d13430 SHA-256: 9ee3a368bdc167ec1faac5a4339e89e4c9ea88b0cf5e1d92605eede1c1556960
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://smidgel.ru/uplcv?utm_term=ferrous+and+non+ferrous+meaning
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/hbfivqsrcjjg7q5jb9pjcpfbub/muzulosowokexosusot.pdf
    • http://domholidays.com/userfiles/file/xoxebafufowesa.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087da7a69588---94245498186.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f3814ea96---10690864161.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16088a40f4a157---sidusaf.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba3033c808---15460211424.pdf
    • http://yaeram.com/userData/board/file/14020926786.pdf
    • http://innovad-ltd.com/userfiles/file/dopev.pdf
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d471a2f838---54749916957.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/sdh3cqe84m153rs0icnhl1perr/zanonomorubetegawofife.pdf
    • https://robert-zauer.cz/userfiles/file/61756624366.pdf
    • https://nestaerospace.com/uploads/file/73067238835.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/18dad9067b4ba9aa078b19a310ae7e23/94199754779.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/717fc251bc7e454e659803f192b5f24c/weralimalitipo.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa6da634b3---43823664690.pdf
    • http://kyanite.tv/userfiles/file/loferuxipejivenumez.pdf
    • http://pokemom2.com/uploads/files/mesozoviwevizu.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/0a4b122f49565bf6bd685755cb984909/44228273849.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/kcamh9mp36gkh1clajsg5kt832/vudiza.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095641c40f21---fifarofo.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/adbh08be836l9v453irfm1call/1185131570.pdf
    • 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_off0000e4f1.bin
fc04b9f636d3bc66fb194f5bde561977b1bbd6d32cf87c99ad65b2eb468efb4d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F1 10628 bytes
font_01_sfnt_off0000fcf8.bin
36a3ccbd981d410d9e488d989d591bb77dc00c63b0f43b278b75baf9348ba75a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF8 17384 bytes
font_02_sfnt_off000129e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129E9 16792 bytes