Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cfa65b0f0ea50d1…

MALICIOUS

PDF

80.9 KB Created: 2021-06-28 06:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 04e091527e79440b916d412323b99c96 SHA-1: 744b6f562c01c4b00383a7cd20a5e209a52037eb SHA-256: 6cfa65b0f0ea50d1895253bb1eb795f0c7dffe5ded70051fccfeadcc0b524b39
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be compromised WordPress installations, serving as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs are the primary indicators of compromise, suggesting a redirection mechanism to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7de99d027---suzozovulebakisag.pdf In PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea40a921ea---57054419582.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/24261710674.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/l6b676lu1k96momtbt4607gca1/45382167253.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/fesalurusiwodiworujin.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081d777e79d1---31424857752.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607898a4e4a8e---tuwanovawi.pdfIn PDF document text
    • http://corporacionnoa.com/UserFiles/file/ravolaxetuzenatusate.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/62878037714.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f68c8d885---dapuduzo.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/30651419744.pdfIn PDF document text
    • http://skupka23.ru/upload/m/60964715582.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/73517661714.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/47108037520.pdfIn PDF document text
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/c7e6dcp6hsdsbtb0jelcmo0v9h/gogemulusowofir.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc9becb029---1975287496.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823972e3447---kikudekuxagopejarame.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160805e7351a23---dodulasunifakabezoperixe.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16093cb22b14cb---58458319995.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/2434e68863f604be727c9ebed3ffbe8f/lurup.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/b076e71278c52c81372d5b19ab08b303/zovamabosogavivigitit.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/1d63679c9aa22b628de3985591da0768/86838756734.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/dawosifadavoroken.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=a+gay+and+nongay+podcastPDF 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_off0000da3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 10412 bytes
SHA-256: b995d2f386d21fc0a75f44bc02885684d69b7e9746f6d230fb7b91123e469f8e
font_02_sfnt_off000109e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E1 17308 bytes
SHA-256: 79536e6f05bfecca1cb51d889552cc4c2c657547d05ba374e811d6906a14a1ed

Open this report in the interactive analyzer, or submit your own file for analysis.