Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5262b0298a1067…

MALICIOUS

PDF

83.5 KB Created: 2021-09-07 00:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 33da598fa1460646fa7edf75de87d20b SHA-1: 9a512a497ed6adef973bbde290c71fcc7a3ab3ce SHA-256: 4d5262b0298a10671a3df50921bc50ebabc801ca69789f3e79ab2d5210b27aa9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. The file functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The primary attack pattern involves luring users to click on these links, potentially leading to further compromise or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://bbpartner.cz/userfiles/file/nisoxawunozodonoreza.pdf In PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/72158979228.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/ccfcf2104336ec71849d7a8111e19ca3/wiwuridifizu.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/62229f2a39078604119e161a43413d54/6140042667.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/83869970456.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///teratoxadoj.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/suvikegi.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a01dd08844---29860914851.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/mulekedamexupe.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/49152892128.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/50cc51845651bbeaba228f391e710c75/18255576876.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/84481152385.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/31871261815.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/96007720598.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a016869d621---45769050191.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e8147a0d537---99592819836.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093b38e172a1---letenenaminagobiziju.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/zuderex.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/18605225881.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2cfeb8597c---46912974805.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/jatoxubopuredulaxijupewil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=shab+e+barat+ki+namaz+ka+tarika+in+urdu+pdfPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/06d9fe12f3745a963810bb44756f118b/63077656047.pdfIn PDF document text
    • 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_off0000ddeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEB 10896 bytes
SHA-256: 04c3f93938664c696a9e0ea49a1433c792bf7838ad58f793274b7de4a472ddc1
font_01_sfnt_off0000f6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C0 18668 bytes
SHA-256: 127bc6eded1a1af4e063e8ce3c09a2715a980e89a704111b6d38fb547527bf36
font_02_sfnt_off000126df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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