Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a4fd23ddddc8590…

MALICIOUS

PDF

66.5 KB Created: 2021-09-07 13:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e3e30781002f1bbf29d851bb596fd393 SHA-1: d7e1507ed321463607cbb5c7dd097b7395ccee9a SHA-256: 1a4fd23ddddc85903408877ced63ddcca85c594bb7374e45acc1b5605ea16bc0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating it's a phishing or trojan PDF. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm used for distributing malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5231

Heuristics 5

  • 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
  • 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://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d412e31ff50---70719799443.pdf In PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/fipafuropew.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/wapuv.pdfIn PDF document text
    • https://wineart.online/userfiles/file/vumilawalopomadizafu.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c235cae7552---lakasa.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/53253311335.pdfIn PDF document text
    • http://vdavloeren.be/userfiles/files/91382407937.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/tl7hcavkc914l3r69k8tntkd46/xixofavegulaf.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/6afbbce0b4a4143a7ae201540c0b40d1/rimavaju.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/t0fbabtpd78nqu92jlqsmi9j91/38006165132.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/67358969447.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/85541964100.pdfIn PDF document text
    • https://tanthuantelecom.com/upload/fck/file/77640859614.pdfIn PDF document text
    • http://conditum.nl/userfiles/file/fuzavosudolefer.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/lolejozifolofonanenap.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0e64216d69---tagiwixazuse.pdfIn PDF document text
    • http://cityfate.com/files/files/5589776830.pdfIn PDF document text
    • https://lotteppta.net/beta/assets/file/80526573359.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/gofunijitexezub.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/80701886245.pdfIn PDF document text
    • http://secoinblock.com/upload/files/26584929646.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/1p2lveqja3v5mb2emqee7fmts3/85223413239.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/nuzofafaxutifekup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=plc+controller+basics+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF8 10752 bytes
SHA-256: b6ffa81cdcad1d4564e836857dc2192c8ac281d6fe185d327b68f54b5e8f70e9

Open this report in the interactive analyzer, or submit your own file for analysis.