Malicious PDF — malware analysis report

Static analysis result for SHA-256 973d2df1991cecb1…

MALICIOUS

PDF

88.7 KB Created: 2021-09-02 01:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8075f9a83b86d423873c4ff23a195a72 SHA-1: f28154f74b022a08cb83a86bd1877d2519d6e5ed SHA-256: 973d2df1991cecb150359a6fce73d8d7009aa8f19c99886cd8c98ae3f70d9946
124 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs that point to compromised WordPress sites and disposable domains, functioning as a link farm. This suggests the document is designed to lure users to malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4722

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://chcial.ru/uplcv?utm_term=best+pixelmon+seed+with+all+biomes PDF link annotation
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/68b64bce86ef9c4e22d0e1fb9f426427/xolulezadan.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/6356141404.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/vizurero.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867a508d63d---gesilelexo.pdfIn PDF document text
    • http://longthinhphat.net/uploads/files/totulex.pdfIn PDF document text
    • https://bloomeng.com/uploads/gubokoxixodujejona.pdfIn PDF document text
    • http://yuha.be/_files/file/kidako.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/8kiu4c8p62lglgt8hqnr3dpdh3/78110122456.pdfIn PDF document text
    • https://pellevah.com/upload/files/55674354741.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/kopagopepixotejanoterufaf.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16116efbf60dc0---bozofibo.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a9672b8bcd6---73423485648.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/84214585759.pdfIn PDF document text
    • http://landpas.pl/upload/file/62183211800.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/71a16e41be9d6dff3ab30321f598aff7/95147044437.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084126344295---60739697554.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/25210189281.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/lupasikepikizarakukalim.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/pegevonuvebut.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d7a415765db1ca643d187017f9e0fc8d/ziwaparevibazobofoze.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/fetexitapixafotojizowunut.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/tezoraf.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/87156089201.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fd71a61d1---70492065954.pdfIn PDF document text
    • 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_off00011d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000135a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A7 18396 bytes
SHA-256: e3bb82fb38ad8a2c51ffd32a7a9bb9d1bf87197765a7e834bf1f2e1f465d805c