Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b9883f4357d066…

MALICIOUS

PDF

76.5 KB Created: 2021-06-28 03:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6093e5b0e16724efd9a84ed28439662b SHA-1: c9d113e33633b4c5283f844b4e4a511a4bcf8758 SHA-256: 14b9883f4357d0664969913e140410e0d566808cb2ee20b7bfa46db87466d1b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to manipulate search results or host malicious content. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. While no scripts were directly extracted, the structure and URL patterns suggest an attempt to redirect users to potentially harmful sites, aligning with phishing or SEO-based malicious campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • 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
  • 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://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c91c2a87486---43580977240.pdf
    • https://safrano.pl/userfiles/file/ponekasapiditekonasa.pdf
    • https://fotobolfestmeny.hu/mvc/userfiles/file/denagugodiwa.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/572406371baeb0bc9a758aa2643a8f71/zurafopedakazesizogexo.pdf
    • https://biorenta.lt/ckfinder/userfiles/files/50390926784.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ca660188e---dixudawogexivovanigisoged.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4520b92967---dapip.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/5ad0b5530a44e86537f34984af159839/tanofazi.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e7d5b48df---nolusutux.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf2bba0c2f---755782378.pdf
    • http://patroha.hu/file/46605313214.pdf
    • http://clinicaveterinariamontecchia.com/userfiles/files/nipunume.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05b38e2c0f---dibexasamapokesipo.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ouqqmog2acc3nftivoc16dkl21/vakeredale.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/6j3bfmqog7rt9vej6riv6a9t6p/piwimulona.pdf
    • https://securityguardsupply.org/php/uploads/file/jenarilezakidopuso.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/mfddd1i27vusate542pul234qo/dodimenito.pdf
    • https://faktxeber.com/resimler/files/degemedobofavop.pdf
    • https://muzeumkonstancina.pl/attachments/file/22261940915.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16097c9252f9f0---63038437299.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab0a2b50ca---36338557659.pdf
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/3669c4f871b055908a4a2a076f0024b8/45477876127.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+download+app+in+computer+windows+10
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7c9.bin
ac67962642ab09dc8ac44a2e72c592f1b37a80ce097f039e48cbaea6d5594051
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C9 16588 bytes
font_01_sfnt_off0000f2ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EC 16792 bytes
font_02_sfnt_off00010b03.bin
f95463c291824cc0e491792bb14cd69bf419876bfc590414cb67c52139f68edc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B03 11028 bytes