Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a4f6971c8ced9e…

MALICIOUS

PDF

80.7 KB Created: 2021-09-20 11:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 46acca1f3449e21568e015c627df38a3 SHA-1: 5685c955a4453c2d549d7d7c08ccc4aa5d9dfbec SHA-256: 69a4f6971c8ced9e86c54775413b5dcaa446e11b27baeab94154938fcdaac38d
156 Risk Score

Malware Insights

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

The 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 pointing to compromised WordPress uploads and other disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c547f62b48---pozetipezipives.pdf In PDF document text
    • http://momsystem.ru/public/file/torafagekifema.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/xitejebuziderem.pdfIn PDF document text
    • http://kup-vino.cz/web/ckfinder/userfiles/files/41879711469.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/72701196580.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/koxomixodifijotulovidubu.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/27957881411.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/gevejasizo.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/39057090894.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/14725257532.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/io0391uae9362ig66s9epm4jk3/66511636794.pdfIn PDF document text
    • http://hansungid.com/userfiles/file/43399475954.pdfIn PDF document text
    • https://anaksemut.com/contents/files/89309046476.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/16c04h6aep3v6ih5unupcdarjp/38548808880.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/lokabi.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/fef936a54b16dedbd81ab4a770ce9e73/wefebotigi.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614267e7df0e3---41974001669.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/gezupa.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/71868866534.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/64678042092.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/pivota.pdfIn PDF document text
    • http://kondicionery-dzerzhinskij.ru/upload_picture/file/72085064845.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416e755c1c1---86674562254.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/lumutitamidibemej.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/24692472147.pdfIn PDF document text
    • http://paneldeconso.com/userfiles/file/vipuxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=jedi+moli+voli+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_off0000d3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B4 19592 bytes
SHA-256: de28d55b5fb020de0eb30548d34567615c17bc8822a5260be1a890f0ef0be867
font_01_sfnt_off00010679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10679 10084 bytes
SHA-256: 72b7c7a0c0d975a3d6b206f863185ce2b02887541520db3526a16a60d6e2e6ee
font_02_sfnt_off00011ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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