Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dc43e01fe2eef1…

MALICIOUS

PDF

76.5 KB Created: 2021-07-17 00:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d849a72244fd41be95e906f5ddaf3386 SHA-1: 7c834a5f3e36ebb9685a5f87ece2a26921015c2e SHA-256: 47dc43e01fe2eef1eb41c24dc7f166a9b3d4729a49ffb1bd282fb0e5e5909760
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f2384edf5---73158739999.pdf In PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cc89f35de50---62230768812.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/g1j0410bjqcvrnmo750mdscsf1/naxejutimazuwakixulitujo.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16091fdc19af9d---30921884041.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9fd4a2858---37478200956.pdfIn PDF document text
    • http://crm333.com/documentos/file/38064047706.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/8156426f96e343794d4224f41fabd0d8/dexur.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/dakarogomelepuzoj.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/a6e12ad3efed59eedf77edce3d3e38ba/18940332991.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/11971062758.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/39406162344.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/504ced6f996d3738e89812bb53d68db8/36186960629.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/5mg1e5n8a2odci9kgip5mpl1r3/90608746342.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/d4a688e8bda17595f1fc2a145d7f4177/16004269552.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb49e99da5---xofowipafuxatabud.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/ee9526287f64f61f0949aa49daff3428/91248284026.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a374dde4220---41990090003.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/rhqnvola4fndfn21fhs0f9mml3/98221807750.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609deb686a3e9---juzon.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/67094308228.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/56267499753.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/dvc5isb06eiei45nd4o1oauds6/natavenap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=luxe+nails+near+mePDF link annotation
    • http://janyska.home.pl/_mjanyska2013/fotki/file/47243022880.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_off0000ca68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA68 10208 bytes
SHA-256: 9552fc052245556732c231fe2323ffac88a6ce2cbc434d50fb677e345bbfebe2
font_01_sfnt_off0000e13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13E 16824 bytes
SHA-256: 7649cc0621ba72a54f2fb60352687b79a086d10c4c2f1843ac4bd18cadaaa7dc
font_02_sfnt_off00010ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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