Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3c390ba9fc3102…

MALICIOUS

PDF

79.9 KB Created: 2021-08-25 05:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 021273be22f304d66043e598e15299d4 SHA-1: d22d13d9d644bb313cfc5094c03f11b5ba5f6725 SHA-256: 9e3c390ba9fc3102e9ba30eff61cabceaa86fab4bea37353d895e151afd1fc40
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with a link farm designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8520

Heuristics 5

  • 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
  • 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://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/66bdfeccec3709eccd03d0acbd6c7c93/pemogojolosa.pdf In PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/dcda43e88234b51bc13682c68121ef5b/pokefubu.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/xokibaramopot.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/5i90fbbd3uk09fdskdqbko3usl/burewapu.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b51267f6da---punesenukifas.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/5o343f200jo3rb3rjuhjfr3i11/4233499056.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/49761513058.pdfIn PDF document text
    • http://alumnicollegedelunion.org/clients/76066/File/logejivevilufi.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c22cac120cf---vogizewikogubeses.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e648746a231---81971531611.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/342123219.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3028ff4215---paxux.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160df65b4a6552---92254829155.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/38409729312.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/lobowoxija.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/4680b1acdf84fe71db0ceb85f54ceef6/15811697124.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/6e76a962be5a054275ad7d94f2cd1d92/jakopolugo.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/38722897528.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/e44249093032d941da1763f45edd202b/xozene.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///madutufam.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16100ea9ddfc9b---94595387988.pdfIn PDF document text
    • http://envigest.cz/upload/file/wotekavamovegilewop.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/zolikavow.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/34bd3eef2b7e20bf107822ea074c7c50/badafuzosukider.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=teachers+interview+questions+and+answers+for+primaryPDF link annotation
    • 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_off0000e3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF7 11316 bytes
SHA-256: 21bcf13bd156fcf4bed42857b90cc0a62385f5023320d0346ece4c0db073d7a5
font_02_sfnt_off00011646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11646 16868 bytes
SHA-256: 0c6ba0ea3eef53884dede1a3c2e6df01f55586e664d25542af144dd7d07a24c3