Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47ee381ac652fc1…

MALICIOUS

PDF

98.0 KB Created: 2021-08-07 01:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: deecdf608519f404fc28039195b02a21 SHA-1: cc54c022b13035700a79c0714898f0aa3ccb491b SHA-256: e47ee381ac652fc1c7f499e6ebd23df6c445266f258d42d1007e6c9113be2369
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609cea3fb601e---5683546138.pdf In PDF document text
    • http://promador.pl/userfiles/file/roxotoputukirizezirub.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b853e363485---puzawurizuvus.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/40117968647.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/28094700045.pdfIn PDF document text
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/42227900407.pdfIn PDF document text
    • https://dcimx.com/files/31944030303.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16070b066ee156---dosiradofujenasalo.pdfIn PDF document text
    • http://ipllaser.in/uploads/4306116573.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbd8930875---85214338348.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/50513112376.pdfIn PDF document text
    • http://3q1p.com/upload/file/210630062302859376obadgppg3p73.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b08b570da---74646542621.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/javafijokanuketo.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/80813823123.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/gatopojetatonedabubibe.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-07-16/images/files/93634535145.pdfIn PDF document text
    • http://usmleworkout.com/files/file/17776854171.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/45995798244.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/kedikulokupezegax.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/pizoxegoso.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/7832833063.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/dd35c594bad30e2ba6ecddb9e63a411d/dasudusimeve.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd770f9ce96---87992875952.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/tibosisekowaxonepason.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=skyrim+where+to+get+blacksmith+elixirPDF 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_off000118a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A1 11184 bytes
SHA-256: f29c3414a76c7d81aa8dcfa18c9a4721fa905c818cefc796507ecb9f9b8368cc
font_01_sfnt_off000132eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AFD 17756 bytes
SHA-256: 790b08700a71308113a6e55c4851bd742064b0acb363d0062fa129730e0ef151