Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcccf74bb8639b0…

MALICIOUS

PDF

80.6 KB Created: 2021-09-19 04:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0207282208ea39556bc80213d8be703f SHA-1: 3b8d2daa43b29e0411d92e6a6da00312ceaa3b3f SHA-256: 9bcccf74bb8639b06ce5d0a4d299e030517d9f2c2ab2cf574a4d9393d7dee28b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to suspicious domains, and one heuristic specifically flagged it as a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://living-stone.lu/userfiles/files/25379138167.pdf In PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/83233537220.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/91517197851.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16131778e939b9---29845448526.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210915231530.pdfIn PDF document text
    • http://shop-exclusive.cz/userfiles/file/tomidav.pdfIn PDF document text
    • http://grabnerestriche.at/65706151023.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/bupiroxenota.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/givoxosako.pdfIn PDF document text
    • https://tuinvandecruys.be/file/75868443974.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/20419957096.pdfIn PDF document text
    • http://eskuvotoszkanaban.hu/editor_up/tewotogapabegusuna.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/pusadidafesawuwukodi.pdfIn PDF document text
    • http://elcivan.com/admin/UserFiles/file/pukivitiz.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/63267728098.pdfIn PDF document text
    • http://rilta.net/userfiles/files/dofizes.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/58186677071.pdfIn PDF document text
    • http://abwessex.com/uploads/files/63894902538.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/m20mappca20t1lrca0k4a12dh6/sagamaxi.pdfIn PDF document text
    • https://gulamanis.com/contents/files/56843199611.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/xixan.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/88727804486.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=halo+ludo+app+downloadPDF 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_off0000d292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD292 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA8 9972 bytes
SHA-256: 9ce83297da5fdbd0d5a5a491d665bc449120f984a9d143f9d9189c95fffe9bd8
font_02_sfnt_off000100cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CD 19440 bytes
SHA-256: bb5d54b5a255bfa1a92642465a60bca90301857d68f3d77cdf6dd816a8765a8c