Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeed321244b39f52…

MALICIOUS

PDF

77.4 KB Created: 2021-07-25 15:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 07fbef32f9577ead8669cec5f623f4ce SHA-1: 51ccb4f8379c71694946a95b0318205c5bdb6cb2 SHA-256: eeed321244b39f522db4e519162bc15cbed1b48aa0149d1bbb4110644678f7f6
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://aqbnb.com/uploadfile/file/49269482714.pdf In PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c966004417---31541867715.pdfIn PDF document text
    • https://vestol.bg/files/file/86316263364.pdfIn PDF document text
    • https://daismene.it/file/22988820619.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160828f864544d---lodepironowak.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/juzujekaluzugakateputawol.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160e4d3408b73c---bupaxojujagibirikateti.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/50778bc2ea1b46265a8c7fd76568342d/4807063639.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba268a3bffb---37190942528.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/53549087097.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/61684430209.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/mewugudekimiwodetewa.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d20358b61---15218252773.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/73713938182.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e284ab7bfba---xomerukuwos.pdfIn PDF document text
    • http://silverleafspa.ca/clients/10619/File/fowanenifelojeteliwaz.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/mizirotasasekesit.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/tapopasoxofabubas.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/18560976557.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/pasam.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/menufusozunoviwe.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/benesafononuki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=canon+eos+200d+lenses+guidePDF 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_off0000cbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC6 16532 bytes
SHA-256: a54b67ec6444a4bdc7f270b06d7b73dedc47dde3129d136820f1b13f45ac6917
font_01_sfnt_off0000f6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E6 10596 bytes
SHA-256: 1900a11686b4a7a5177d16db89e7f88ee975b1c516101f31dfb3b5a3a4afab5a
font_02_sfnt_off00010f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1