Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c89ace780b78b02…

MALICIOUS

PDF

87.2 KB Created: 2021-09-11 13:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 01587ce7d4251f3087d40cba506bd855 SHA-1: 7358cddb65f2bd47624e4e765a6d5bb6344f9d84 SHA-256: 3c89ace780b78b02d4e55777788e44fbef9eb9a9acdef5bd8701768bfc75b570
236 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as a phishing trojan. It employs social engineering lures, instructing the user to install remote support tools or browser extensions, which is a common method for delivering malware or stealing credentials. The document also contains a link farm pointing to potentially compromised WordPress upload storage, suggesting an attempt to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://primax.fr/wp-content/plugins/super-forms/uploads/php/files/2a3d9n0iuar6vejkh7h2mati06/luzapoxisunibe.pdf In PDF document text
    • http://zetrade.cz/userfiles/file/gikibisi.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/vogozapowe.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/85240435930.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021090751821_858030028.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/dejidas.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/rirevexivanazudaxobuw.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/gisorujetedikigajozaviwok.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/savufelevumawuxilamuk.pdfIn PDF document text
    • http://gestioniarmatoriali.it/57860192757.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/19148784799.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/hdbmq3kn0cc6ek7sqp7b6lgnu6/8267599249.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/1954522975.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/kadarowagujo.pdfIn PDF document text
    • http://myagreement.com/UserFiles/file/78340545845.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1dcf94e95---63602076894.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202109062250537556.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/xisilusapi.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/rabuganusisoboge.pdfIn PDF document text
    • https://cuatudongnhatrang.com/uploads/files/14832670118.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/76523002559.pdfIn PDF document text
    • http://silverk.ru/img/lib/file/zinorogine.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/9a05ca00cffe6efbbf132e54b5a2df27/tubawimafufusobino.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+share+phone+screen+to+pc+with+usbPDF 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_off0000f018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF018 17876 bytes
SHA-256: 1219e941d88dd11494ee5ca6ec11730448f424db2766a9d13a1ab21ab59d6c26
font_01_sfnt_off00011e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E54 10740 bytes
SHA-256: a9cdcf40cc4a5817c33f2c58584c339f2f7aceb546da0ccf4ec11378e076a85a
font_02_sfnt_off000136d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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