Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d27fce071156e5…

MALICIOUS

PDF

93.1 KB Created: 2021-08-01 18:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c121050dac8c428e993b1b11479b9915 SHA-1: 2f585c9044517b3e8e7e5a26fa3b9885ab440c5a SHA-256: 54d27fce071156e5ec5851eb0ac687399582a3ac05809ca6d1098a996a64caa7
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://cargobull.cz/res/file/61735879329.pdf In PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/51d4c222c6034b4d2826eea7990a0f97/82859334544.pdfIn PDF document text
    • https://davaocarrental.com/images/file/93703221907.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/78874581284.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc509973a7b---gawepadunemajukokuxu.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/551493b9c43c2ea589ef500b0a7eabb5/sosabotivotanifi.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/82898383409.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/c1b9013575e8bcfad8cbfb22ecd86191/vutakewavufuvizogi.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/844482dc9254c2f4a1f09ce16a1d498b/35865720228.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/99359201755.pdfIn PDF document text
    • http://klefmarken.se/upload/file/ramirurozeme.pdfIn PDF document text
    • http://altinay-law.com/images/file/jebenupixeniberur.pdfIn PDF document text
    • http://willbramephotography.com/40193993869.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/2443127068.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f6d4cbdfe49---90025628033.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6c375fee1---kowidog.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/bakitidaxipuvetepuxakovip.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/9d72d9d5285a1c9b5c670bf81f55d371/93853976124.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c39684a53---jupepusobepox.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16070955e04793---93710466304.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a453303642f---pumurozetatutemuwuxejalor.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/fasokabegusudokaf.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609202d197e9a---zudurikusazalisu.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/37230722833.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f90d4e04b8---17303742033.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=1+to+1000+number+chart+in+words+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_off00010538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10538 17292 bytes
SHA-256: 6c684a9df55adfb9a4f2e61745afc4851ee21358a24fe3d71f6e30ab1df26089
font_01_sfnt_off00013261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13261 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A78 11240 bytes
SHA-256: 0c5563ca54617dc312752dbc731eb3756a4e5f8b02c86b03eef3ed05ee327aba

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