Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ccf5eea3b31653…

MALICIOUS

PDF

91.9 KB Created: 2021-09-07 22:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5be2dc549a4f36ce90004039ee614f9b SHA-1: dc2241ad893093e2f9a216befdb9d88ed2b3ca13 SHA-256: c0ccf5eea3b31653923682dd42bc25dbead9b527ec8a5ec88b0aabe8a2961560
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, a common technique for executing malicious code. It also features a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute further payloads or conduct phishing. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/30a88d7b7eb08b68a3f8e2efa6b072a7/88442821954.pdf In PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/fawik.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/38065738863.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611daad9de4c1---31245284323.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/r07bkevkmc8qe9rasenpgbgn31/padilagodavu.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4eecf4125d---lizogapetatelovigafora.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/81d1391cbdffc5536d7b857d4e311210/torojuzerunizomuroneti.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/fd8260818c0b8c162635b771ce395d17/18120017574.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608651e29b513---guzopokabonu.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/74147571038.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/tibegozex.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/h0r7n6k3k2ksl56ov7h9a453qc/jodalefuguvisikeladolised.pdfIn PDF document text
    • https://proxus.nl/file/43995696969.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/99387736127.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610f2f6328d9f---35115084790.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/p0mkj8pbsl23dgq1id3t9necom/30594826736.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210617163408_rxvlaa.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/69957807715.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89113681852.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/0g44tbjgfjjma0cj7fer9133c2/10795182655.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/rovubosigidare.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/11023472132.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/retumovurozos.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/27219252253.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4653b7a01---bizafanurefebu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=individual+criminal+responsibility+in+international+law+elies+van+sliedregt+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_off0000fd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8A 11420 bytes
SHA-256: 7790acf9fb056ef81659cfffe9dca99fc5e2665f9f8eb441d7ceb51a2a7ef7fc
font_01_sfnt_off00011820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11820 19004 bytes
SHA-256: 4defbadfceded17a7aac620fd7751f059cc3a2743cb7d5835a178f5d4a6d069f
font_02_sfnt_off00014921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14921 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1