Malicious PDF — malware analysis report

Static analysis result for SHA-256 d392b71000190df4…

MALICIOUS

PDF

93.8 KB Created: 2021-07-22 01:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2c08da0370e49bc55a043dfa8e876cb7 SHA-1: ea055a49825a412f43cbd2800c9c513a07d9387f SHA-256: d392b71000190df47af51682b1ec732ae666f7b9004ec826fbfd6f2e09bb5770
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. The PDF's structure and embedded URLs indicate it's likely part of a phishing campaign or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/4fe62bd6c46ac99efadadfbf556874b5/setederexiju.pdf In PDF document text
    • http://project-lovcen.me/userfiles/file/96194629888.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/jubami.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c1e19097e---totimoliwexepe.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1a85bd19d---jonazufut.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/39492461418.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5aa7fc7b155e786206e0454a7a53ecb8/kabokokezu.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/9700dacc88df0485c3e0d56265e5996a/benexufonulenulawupivik.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/0a41a164afe4b6ccbffc7ebebeb6dba2/xuwedubetaba.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/b3707d2989f91765e9aec41e3f100ed7/zagopor.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/67266693122.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16094826dee0a4---13043491447.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/tapalunubivadoveruvageg.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e396e1eaf---gijixi.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a69fd6315d---fujujububizu.pdfIn PDF document text
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/19317213421.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/lekujivebegebapeju.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/43253555689.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/m3l28pjtjm0n7bm9sftqrc3j17/jabarov.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/99245824477.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/vq1u6t1tvg7nnujuqtscsiamt5/wifaviduzotekoxuwakeruga.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/jajirixozuno.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160707b3fe6dce---wulub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=meaning+of+barriers+in+communicationPDF link annotation
    • 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_off00010ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA2 10864 bytes
SHA-256: 6af0875488e42bd68f56cfbc9f0c1b66c234151ac2dcf2c9f5cc61e37a164a8f
font_01_sfnt_off000124c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD9 16952 bytes
SHA-256: 067a2b2ea62feee180ab183ac7dcd33a1edb0b0fed7c6578d2d6bb83505b33e6