Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0974e25d9e4f998…

MALICIOUS

PDF

104.2 KB Created: 2021-09-18 17:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1b40fb689ca37ee66d7d75b9c3f62002 SHA-1: cfd1364a5bb7d546da0c3895b22776aada19feb5 SHA-256: e0974e25d9e4f998f3ad980448d8b25e519b6c99f07c8b22a45443fd6d3e873d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • 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://nceed.kr/pds/userfiles/files/4269835349.pdf In PDF document text
    • https://healthtecindia.com/userfiles/file/rinonugavizofipod.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/lituzulirutotetulisaw.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/efdcde68cbbcb04a921f155bf7cd01c7/13119627229.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/jolazesoz.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/14652332159.pdfIn PDF document text
    • http://e-sportis.com/images/upload/babupamuxo.pdfIn PDF document text
    • http://photo-ostrov.com/ckfinder/userfiles/files/balifawapo.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/tedanuwejaleweresetu.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/a5oqr5gi7vhp6dvoaibeth4146/37778264694.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/78614676726.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/29200908104.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/14198995588.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/9r3s724tj5qfr3sev5dcpd4gi8/91019124431.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/zoxumixemosozofuguvuliru.pdfIn PDF document text
    • https://friendsofmultisport.com/ckfinder/userfiles/files/18195368500.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b55b90e136---5567954667.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/mavanajituw.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/babuwimaratukof.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8c2291b5f---dugulujiburojejujavo.pdfIn PDF document text
    • https://felixtrail.com/imagini_ws/45256836213.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=the+late+late+show+with+james+corden+live+streamPDF link annotation
    • http://zs.tom.ru/jsplugins/ckfinder/userfiles/files/limasojonegatanewira.pdfIn PDF document text
    • 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_off00012dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD3 10880 bytes
SHA-256: 4f7a494db60d6953496f33a23f9adcdc99db29321cb8dcc0ad0948a9aecf0787
font_01_sfnt_off000146d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EE9 19772 bytes
SHA-256: f8479d2410b1d1d2db61d0bd5bfe0b2ef12d15961bb7d4b2f7e03b86b99fd558