Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e34d3b2054e51e…

MALICIOUS

PDF

92.7 KB Created: 2021-09-04 05:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 18160ab2cae3e184fab2ae703c826e47 SHA-1: fc63d9e5cb8703978abeba28f22b5791e824514e SHA-256: 96e34d3b2054e51e4ad8c6c5fa0ee0df8cbf4f1b990951fc8680fb54daac92f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to numerous URLs hosted on compromised CMS uploads and disposable domains. The presence of multiple external URIs and link farm indicators suggests the document is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/qf2j74cto5n83o4kbrre87ilsp/releva.pdf In PDF document text
    • https://betalinktech.com/blmedia/file/30878753838.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/56284607555.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c82c4ff4a---kexazevixomuvivarufarulup.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/46256795553.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/3ss9uvtcbc69uhdio50hhuvsln/temawanuteraroragiwobe.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/suronewifajotusos.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/5ca6746f54f0f7302981edfce37a4040/85310889886.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9e5feb6f9---78824608880.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c10d04b7d8a---wuvonugasetune.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/95920795317.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/94403664889.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/pumasujugijumokupikedazo.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/d5aa099a93753569bd8a151c60257b47/76672064876.pdfIn PDF document text
    • http://dges.in/userfiles/file/suzolotaritizomotod.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/9737ab73c0e4dd46c52f0e6dc3892b6a/xususefavirizalagudag.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710eb17fd1f---pajopuvepivutuzivizaraf.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/jibiboj.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/91920745233.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/5c0593782200ae4f8aa6d9e16c83373d/sadesepe.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/91070640945.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/kisatav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=manual+lymphatic+drainage+massage+montrealPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011ab3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11AB3 16944 bytes
SHA-256: 089d318fcbecca02c3d050d19ae61800b06f1ebbd4ad79792402fda90ddb8a60
font_00_sfnt_off0000e8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FE 11168 bytes
SHA-256: 2337300685473cdf91745317088260eafc47e70efbefe264e4b4cb9d7d378fe3
font_03_sfnt_off00013353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13353 19124 bytes
SHA-256: 1476b834277c9894613ce09c88ce160ab5866015557968c71ad594925709a404

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