Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05dcaee9313ef6f…

MALICIOUS

PDF

87.0 KB Created: 2021-07-04 18:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 26ddd7bde36ace27f3fbd825c6a5453f SHA-1: d9d76bfa9a10591ccf29d070727a095b6d0782f1 SHA-256: f05dcaee9313ef6fd5626bf8597986d47a1a1fb5a2eeb0c649712be3726e2a9a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as a malicious advance-fee scam, likely distributed via spearphishing. It contains numerous links to compromised websites and disposable hosting, suggesting an attempt to redirect users to fraudulent content. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://chcial.ru/uplcv?utm_term=coco+fit+franchise
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/7752cd9098b9202f97f441aaf3136f0c/89460876699.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086402b1cfdd---zovakitamiben.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f570203ae---43098301584.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ao9q2m2ioatp71p4p36m7tu470/17738024750.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/ffeac86dbdca3feaa20fed061b63e30c/76048847174.pdf
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/25521490284.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160984b133e222---lijoxedegax.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83960883c0---lizazaloguvewulurita.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/e349b99e9647bad5c32494c9d07364ea/51986362631.pdf
    • http://banglenhospital.com/UserFiles/File/lofeleliru.pdf
    • http://songpinhao.com/userfiles/files/18018497913.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/5267d4e7b671fa9d34e36feedebefe10/13506038393.pdf
    • http://scvumaichiramen.com/uploads/files/muvesepipokodumogomopase.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a53d9de552---56061149180.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/1e86311be95117e5d8d7006b721db8b4/4908245143.pdf
    • http://humanitool.ru/userfiles/file/15328619756.pdf
    • https://proxus.nl/file/80818341652.pdf
    • https://audit-advisers.com/userfiles/file/59064742743.pdf
    • https://kaisar168.com/contents//files/91538823905.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/c644d4165e4f93403a7145d9e341b771/42924178189.pdf
    • http://abovomedia.hu/_user/file/kojitiz.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc995eb36db---nadoximinidenoronajarikep.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f081.bin
62977060c335543029d9075314e62f46808441267b4edc668acf90e5347d9541
pdf-font-stream PDF embedded font (sfnt) at offset 0xF081 10420 bytes
font_01_sfnt_off00010814.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10814 16792 bytes
font_02_sfnt_off00012026.bin
9e66c55994b3523859d9a4fa2f87f6f1c21b6dfcb7d163fb35018aef85f43265
pdf-font-stream PDF embedded font (sfnt) at offset 0x12026 17924 bytes