Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05fb5f62a0c54a9…

MALICIOUS

PDF

97.5 KB Created: 2021-07-03 00:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6233960e17d1e93c00c36b01d8b9ce28 SHA-1: c5739b44addb30f7c46dc613704fbcd6fa33f237 SHA-256: e05fb5f62a0c54a96f5fb7e083c7b9835d4664621bc46df791a8e0f93816063b
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as a link farm pointing to compromised CMS upload storage, and ClamAV detected it as a phishing trojan. The document body is unreadable, but the presence of numerous links to potentially compromised sites suggests a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083de257de00---11243479884.pdf In PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608412c0df03f---74888181589.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/ac92f17d13471e3806c810e6e535d160/tirulufuxiwew.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/e86374c46f8ee9b3aebafe5fdde9108c/58362052312.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/mibuxefaxefetozaf.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bac0aa52d---92580571659.pdfIn PDF document text
    • http://turnyras.lt/Files/file/bizogazabagizukinu.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/63187022042.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/k63abol42ase8keu4etlb4op30/50677771860.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/96d7ea579c33a084905f35ebd326e011/36800162578.pdfIn PDF document text
    • https://ahha.az/userfiles/file/delimar.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/rqf7ppjkmt57f4nnfkh6aj4eme/23959845717.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/23586545605.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/l8kqe4l5tan4q50a6vpthg13bc/76318350109.pdfIn PDF document text
    • http://childhood-matters.com/clients/49507/File/36135418293.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b94335ecf4eba8165ad7db6e130db8a3/36431901420.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/rimadefimex.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/85e5c6b27673662f1ca1f56f6b519159/kifamazumivilitom.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5336ed970---97412344967.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160d457bee083e---nifevud.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160979c4f88c61---mexagutalubolavi.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/25828255936.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=catriona+answer+in+miss+universePDF 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_off00011921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11921 18348 bytes
SHA-256: 8dcd662c919d03407185d51cc389c9e150bc8d5c8b884f8a4668b76f9570f489
font_01_sfnt_off000148b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B8 10504 bytes
SHA-256: 12f267a0b7dd79d1cd0d81689a8830ca680cbf260a87ad8484d174cf0b4eec10
font_02_sfnt_off000160bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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