Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9eb6f298977ab1…

MALICIOUS

PDF

134.3 KB Created: 2021-06-25 20:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 28539e1929bebe9fb9aa23b873069079 SHA-1: a65411f65a5b58dd09729d33ba7adfab5d074753 SHA-256: 0e9eb6f298977ab1f8a2d61a892db737ec05babeb1e2fc30da75431a2858248e
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting, which is a common tactic for phishing or malware distribution. The presence of numerous unknown URLs suggests a broad attempt to redirect victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/c9baffbb92392807b05f8663ab49560a/roludej.pdf In PDF document text
    • http://beautifulmoda.com/userfiles/files/ziwadibeduwiko.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085610fd1274---rafimonuv.pdfIn PDF document text
    • https://lymfologi.se/anvandarbilder/221/files/945744669.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baaf9ce9439---12726845359.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608634b5c2a9a---18540951840.pdfIn PDF document text
    • http://hotelsandmartin.cz/files/file/47298861148.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/66982973329.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/94214b6eec40ae6a8fd5fd5e11b57d7b/ripaliw.pdfIn PDF document text
    • https://aashianarealty.com/file/45733315649.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ad7bceeb2---34960605593.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ca68c58f2---xunuwefipajawapukejewuzej.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/38c83a9840944dd6d84c9c00553a82c8/fazolakosoxewitalegamof.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/dulonopidodad.pdfIn PDF document text
    • http://iphysiology.ru/upload/46396064325.pdfIn PDF document text
    • https://triosms.com/userfiles/file/nokifexoxusofasep.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/bosaravatujate.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/serewiwudozozoz.pdfIn PDF document text
    • http://bulmarconsult.com/files/98538876527.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/542f7d824c99342a12e5fbe3625e7e19/14897520379.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/02c34505014bb71db705729cd8c77b63/93367766798.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=data+communication+and+networking+question+bank+with+answers+pdfPDF 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_off0001a9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9A8 17752 bytes
SHA-256: 80ec15dec163be5a43b39db1f812736ee14b24bece2f08dc55cc47c1bff28e2f
font_01_sfnt_off0001d8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D8A7 11584 bytes
SHA-256: 5a3b3508edbf4b7c4897c90a7221f51e6033f90ed7e9aa39cabbeb3a37bfee40
font_02_sfnt_off0001f355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F355 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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