Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc44ea4c8a099dce…

MALICIOUS

PDF

101.5 KB Created: 2021-07-04 19:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 788492196410ce1144db5c2f8292ec86 SHA-1: 4c778f7724b1b6d5f7b2b1052e4cf9ce10a824cc SHA-256: dc44ea4c8a099dce385ab5380624bad0b621059c9bcd8f4b53ac5d1d977cda83
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it contains a link farm pointing to multiple compromised WordPress sites. These links are likely designed to redirect users to malicious or phishing content, a common tactic for initial access via spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2938

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://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/386a9d3a1743a4e71937bc9d35cd6117/nomorodap.pdf In PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/fa0a1fcfab9c53135bff5d4c02c297b3/65609370818.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/52670598581.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f58dbfbe6---kejarotamubijuxopiwotupuv.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/7671cb872b3ae2abf2038285307e9e65/nekinavetixogubi.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/82584112253.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/02f6fb78959a3a348893e679fcb69e59/jasonowupasonidapa.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-6-21/20210621152917673053.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce5df4e33e---2840457529.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/1bdb706ee37206587f351c54aaf7d408/waxekukadubili.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/koxepupaxitag.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/jujovimomabafanerovav.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/fiwara.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bf00e15bf---8689747859.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/fujasezavusixerexonepeliz.pdfIn PDF document text
    • http://poolprotektor.com/userfiles/file/99561021308.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/cmf0c6lkoh6h5e5aklr0hbj1ia/jegidiwoxerul.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2f97df9f4---lapeluj.pdfIn PDF document text
    • https://buka.ru/sadm_files/35401169629.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/fatufibosutinikivejuf.pdfIn PDF document text
    • http://waterreducer.cn/d/files/53233416690.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48f7fa15d0---60286025362.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/vumopokotekuwol.pdfIn PDF document text
    • http://maihome.hu/admin1/file/tomirigonewaxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=manual+accounting+information+systemsPDF 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_off00014323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14323 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B3A 10888 bytes
SHA-256: e9fcb480ed6b3209b06aa5f81397146d703b418eac86b0fc0410b852cbdc48ed

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