Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ccb3905d693020…

MALICIOUS

PDF

115.6 KB Created: 2021-07-07 23:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f3fd6b25181df7d7daad655032840873 SHA-1: 62a9cc992bff27795979a3d21d87badf0bc311fe SHA-256: d0ccb3905d693020e8c12f503d4b78c76e6683dcfff4b5cbaf6eb119ea4066b6
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting domains. The primary purpose appears to be directing users to external, potentially malicious content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085ed8f6f4e8---virepodegodozexu.pdf In PDF document text
    • http://2440027.ru/upload/file/wixaboke.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/25595199330.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/7h76rgg3en3lqgatrndo2n3g03/50320257173.pdfIn PDF document text
    • https://faceless.me/userfiles/files/lexaxeliwan.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a55d86d8e4---koxopikebifabuzada.pdfIn PDF document text
    • http://theettiaresottawa.ca/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/39787316957.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/49362852707.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fd388a9c5---49250215981.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/325a1heqm5c0n2l1cqst5isn52/vexefedavexazulegivefol.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f4648c914---zasifurumu.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160708c8db7afa---verezubu.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/lavuwolaguzes.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/3f337102715a09d0b5483e50653481f0/lupudogopij.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/292141si80p3ab4r5iugs18468/88205006260.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/zidagamele.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/81bb9b33ec05054e64c4a18d140dd762/savujeruwebakebewebo.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837629ec5c9---68255233653.pdfIn PDF document text
    • http://mcutech.net/files/96334060955.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/d55aefcd70c5733633da4318e12e318f/bineselotuvo.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/74665800200.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607475e219170---98651263262.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=soteriology+101+romans+9PDF 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_off00016355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16355 17184 bytes
SHA-256: 20da395cf639e622030037d7b7fce1adfacce309a47052feb684df7e4d6b9120
font_01_sfnt_off00018fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FE5 10984 bytes
SHA-256: 1764268c6fa80bbb99ea7de3d8fa34837a33dcacb84566cc4530c0e9bbfe2ca8
font_02_sfnt_off0001a970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A970 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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