Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc025f4e182560b8…

MALICIOUS

PDF

84.3 KB Created: 2021-06-26 13:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 68296f7aa0bb9ee9374ab8158951b0d3 SHA-1: 47a54414a81ec961f332b0f69a8642e5fe33478e SHA-256: bc025f4e182560b86722ee08afb96b6afc9bb259f2adacc2d0f598ed20a7730a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of external URIs and compromised CMS upload links points to a common tactic for delivering secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://allytemp.ru/uplcv?utm_term=agricultural+tractor+pdf PDF link annotation
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/b2050f7e621dcb0e9dc0f285fcad7007/84391801615.pdfIn PDF document text
    • http://adveotec.com/img/file/80969317251.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/9314915692.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/bv8rmi58p8q46v9aaknj1ls7h7/77783220742.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/865b1ea46dbb82428d71b09bc62cef2b/8722017790.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/07eume7mte3gphsetoenrqnrng/64843454821.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/50423310635.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/jisoborojabagav.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/aa368fdf5f1133feec93668639cb2e9f/kolirej.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a96ad58cf85---66723263775.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78596e2009---milifotaj.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/30477768716.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/bh70lj5i64h9jna3pkpmu66ou5/25356269749.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/7150c0b3a1021f02b40bddaf45fffd66/14201220295.pdfIn PDF document text
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/58bef3d2e8bf7fce19c743ef6893e06c/luxiniwutinobapimitir.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7d320cd95---memulazexunotoxev.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/47ibp3f97nbmaecd0shvhjpn9e/19742346235.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/58255193481.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/livowo.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/bt5ss9p4rrqpchqkqclhq4e1k0/kukek.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/v1of86e5nmorgllf3lc5ob1ki6/mifezalu.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/g2c9vb2giimorcf26ikgnd2hbq/nusokomumov.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/lizado.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/17384132163.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/db729d9t96lbgns3f4n06rau57/fajagoboz.pdfIn PDF document text
    • http://ahchala.com/img/file/sibisobebalomebuku.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_off0000e934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE934 16440 bytes
SHA-256: aa19d1b5677bf5ea2266670d087992ef6a23b2834dd1518aee6accf22b003a94
font_01_sfnt_off00011401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11401 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C18 10472 bytes
SHA-256: e51669d27af7527012e6dbc2cf9dc18b53cc778d6c9c76d6ce35cf6c8ee496da

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