Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e48c55ec448977…

MALICIOUS

PDF

74.2 KB Created: 2021-09-30 16:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: c58c1d5ff9d57b3986e55c8c765b387c SHA-1: 298183e6f48776d3147688f736a49f8f369fb0c9 SHA-256: 93e48c55ec4489778bf548b7bd9917ea20bdd92fa3ceb177157b8492a0efe5d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, including a link farm on disposable hosting and links pointing to compromised WordPress upload storage, suggesting it's designed to redirect users to malicious sites. The presence of embedded URLs and the PDF structure strongly suggest it's a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://drafthe.ru/uplcv?utm_term=jester+virtual+apk+download PDF link annotation
    • http://flathead.herosuite.com/userfiles/file/75046539237.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/bojav.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/73297881337.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/84573032268.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f93d330e8---25474614637.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090523001660.pdfIn PDF document text
    • http://afslab.asia/upload/files/bamapimeruzezusojokebelap.pdfIn PDF document text
    • https://skywaynepal.com/userfiles/file/wovawarudupovojifefofu.pdfIn PDF document text
    • http://traviet36.com/upload/files/jopevu.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/68a8a4473ef799e298d2327911413b88/98310495717.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1614d6e1d4ce5f---dokususemasu.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/tivewimozaxukew.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/60925717573.pdfIn PDF document text
    • http://jiachuankeji.com/upload_fck/file/2021-9-16/20210916113352302319.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/vigafobigapo.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/7cc794999b11fa0d2687699fe2529961/nizekufovafevaj.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/rigibuki.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/bekibobukotuxinazajesexo.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/nogovofojanu.pdfIn PDF document text
    • https://pacificengineering.co/imagenes_cont/sitio/documentos/zefemujokovifikuwawig.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/161429469d0243---mojow.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144c27ba0674---54254834672.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/34614005210.pdfIn PDF document text
    • 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_off0000badf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBADF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F1 18428 bytes
SHA-256: 9c09e46fcf2d7bd700bbb992f4df74570b9f6c03e8200ea23e85a3a2301e9851
font_02_sfnt_off000102c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C7 10720 bytes
SHA-256: 1279e64eb9f8820e285436f227b17986fa2154a884472d9ccc5083f261f5d686

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