Malicious PDF — malware analysis report

Static analysis result for SHA-256 24683042ff06d010…

MALICIOUS

PDF

84.7 KB Created: 2021-09-02 05:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 78794217823ca99d0b273c4c561cfdf2 SHA-1: 7702672bd36ee32089d5b327bb5ad8c072484849 SHA-256: 24683042ff06d010ef9f2c0fe00c4240befc13a3d6e227b3c7f45958bfab3801
164 Risk Score

Malware Insights

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

This PDF was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many hosted on compromised websites, designed to trick users into downloading further malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608af2d90968d---venegufefid.pdf In PDF document text
    • http://graficaeformazione.it/userfiles/file/bitozo.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/56661310031.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/7aa1bfeef9057ca17ed14c352be55f20/kinajulabetidiporoposowe.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/22fqjce7nkk1t2gr7g07h71ti9/nodobiroxuraba.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160fbc99dd80f4---69287992687.pdfIn PDF document text
    • http://plncse.hu/php_data/file/piwefewogugudovejunir.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/66253538483.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/4928634a09012d10556c4a752adc1cd0/92329174568.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/zoponakorepurasetiwot.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/20fa6b3c388b8243c5eb1de3a648cd51/26458640743.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/javalo.pdfIn PDF document text
    • https://angkalaris.com/contents//files/vigusavexaxexunavok.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/190kilc47bo6ieussec8n0q9k3/86939746926.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/kegefopaxezununedifipupo.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/dafejeluvixurix.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/u77u1ifooenare5aeqouuh55to/sevolagiloxato.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/lekuzigixuxub.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/18847298712.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/07a300bae6820fb3812ea3aa12d083f9/jekunejasenavezorisut.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/53248900858.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/5e293745ff0ed85c4c141553cf3dfe42/morodaluguviw.pdfIn PDF document text
    • http://llux.vn/uploads/files/musese.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/sk4gkt2acdtmc053d3ga9ltph0/93452890172.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=welcome+to+new+york+full+movie+download+480p+filmywapPDF 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_off0000e3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F3 17284 bytes
SHA-256: 65ca34309cbf5aed0b77af7621b59c7f27081b290b94bc983a3724112c82ee19
font_01_sfnt_off00011087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11087 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001289e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289E 11472 bytes
SHA-256: 34e40091cdb2e13027fdded5c0dfbaf992b71c8df10e5dd6319134759f1ccb9c