Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55e2fafde67e71f…

MALICIOUS

PDF

84.0 KB Created: 2021-06-26 09:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f2986d89c323728c835b4d2ec122992c SHA-1: a62f56cd3e36db3a23da149da24467fc4c79f24a SHA-256: e55e2fafde67e71fb639aad431163eb68dcbce33cee020d5d1839c3002e64313
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised CMS upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of multiple PDF files within the URLs further supports this, indicating a potential phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/08e02648c12212ac66c2f7cc18504c6a/gofoxazol.pdf
    • http://tfforming.ru/d/files/58614716418.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/014d747972455145fdb593780ceafc09/62599459092.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/73dd8570929bff7583652fa8d36aaf23/6566861993.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/6d0d9c0e8f17af1fcd4da69bf7afedc1/16965414495.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16070e14a472c7---62042750346.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607398d6c9d61---bafevupogulidir.pdf
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/22638002068.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e84dc0623---48749658751.pdf
    • https://rpdev.org/ckfinder/userfiles/files/93182786552.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/9q1nrr8e5j454socpsr5vd6a27/24973880126.pdf
    • http://cokhiminhhien.com/media/ftp/file/kufenupimediz.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/lp9f35e10f81v7jukugte5ohhi/70594383724.pdf
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wadisijo.pdf
    • http://i-dron.cz/data/file/dijarabagezapedusuketawug.pdf
    • http://campcolefamilyreunion.com/clients/82065/File/43627829222.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4eec56863---72338298444.pdf
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/zulezejane.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdce8a9d8e---musufo.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088ac5def04d---44933308860.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=shooting+star+shower
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e611.bin
5d66e7115b41e5eb0516480f6d4d12687c11b1e60be85d130628b786dcb4ed7b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE611 17364 bytes
font_01_sfnt_off0001137a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1137A 16792 bytes
font_02_sfnt_off00012b91.bin
c1b8e88d56a5b87865d5aecf5a9d21bb9f099ed68396b0670e1a2726d50c8d4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B91 10504 bytes