Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b2a0c290403af5…

MALICIOUS

PDF

83.3 KB Created: 2021-09-01 16:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 19f444a687ff42100e620f7bbfe5f9b9 SHA-1: addb60ccb0afcec43928be845a45a581d964cb9d SHA-256: 30b2a0c290403af5f74b59e5c3399cf066be4d560ca0330eb859870c4dc7492c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/tq2ceoqpqa85spg6n2jds0c785/96117281824.pdf In PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609db1513bcf7---wasogozitipobuwedadi.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608138cfe1335---peruxitumiwaragejof.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/28227568678.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/fefe28f46dd25be83fe9ab5199555857/88409802439.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/e54ef414448f1f30df1fe7d73143ea86/wevigarulexevevuvowutota.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/64848529814.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/70757587969.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/5ad0a139206967dee2432dfe313f04a8/35666900753.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082b9f5f396b---56434769558.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/97780524604.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/45556035117.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/6f4f9e361f9e759744f7894f638153d7/60670349944.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/50962455524.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a09e6dc274c---kapax.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/514384330.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/modimonatelagusen.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/24353914091.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9ecf31817---futizadurisabixamo.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/8ab40f9474e909e6ce76cf7b62774ef8/dunawesi.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/57917283144.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/pejetejetowigarizoril.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=upcoming+quarterly+resultsPDF 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_off0000ddba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBA 17828 bytes
SHA-256: 2bc63c63f7071ca4fb4f7a310a69e904796ec25b2e9d97d27b99300e6a67af52
font_01_sfnt_off00010be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE3 11084 bytes
SHA-256: 2b1e0f36597f0b53b669821fb0609b6f9923779dff146ebf6e7685bfffe1c140
font_02_sfnt_off00012573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12573 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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