Malicious PDF — malware analysis report

Static analysis result for SHA-256 fedec574787d9a18…

MALICIOUS

PDF

73.1 KB Created: 2021-09-05 00:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 92e3041f8aca803ac4b37e2bc81b6c33 SHA-1: 82afff30ea95f29d099c01ad3f06532fe0759dce SHA-256: fedec574787d9a18ffb2926e023e922f4e6de214d5bf00747621db01ebc6f144
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to compromised WordPress upload directories and disposable hosting domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pixomot.ru/uplcv?utm_term=manual+compressor+parafuso+schulz+4015 PDF link annotation
    • https://mtmnetwork.net/uploadEditor/files/38751206620.pdfIn PDF document text
    • http://standardamulet.com/files/files/dovozitotafudonik.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/32430223841.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/89933853226.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/xevidipujukobejawe.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab3b12f86d---gugoxixepanubiket.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607726dceb38a---68046536865.pdfIn PDF document text
    • http://honda-vo.com/upload/file/nazajapuvetoju.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/ade5752724e4d70755881d8dd4da3e5e/53155566337.pdfIn PDF document text
    • http://ausafe.net/images/art/files/sanififeji.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/pg407tbnnjd0mnlmd77m0eqrri/suwedagivefudajalenowif.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/dowujuluburabowosov.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/97974105229.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/mafasaxupobezuxa.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/16148611385.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/ebe4179d3ef5984dd4ab16358c76bed9/ririgedidakuvugokolifuko.pdfIn PDF document text
    • http://flambotour.it/themes/userfiles//files/tapevegeki.pdfIn PDF document text
    • http://lepal.sk/ckfinder/userfiles/files/90297329328.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/fuxivabijafax.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_off0000b7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C1 11092 bytes
SHA-256: bec701ee5471bcfdf10f83d809ee6958db47a4a2944d7555a0383f82d0834be0
font_01_sfnt_off0000d18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18B 17688 bytes
SHA-256: c37878b7e2fba0199c673a500e01725ccfb60ac3f8392908d50a557a18b28bcf
font_02_sfnt_off0000ff41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1