Malicious PDF — malware analysis report

Static analysis result for SHA-256 25b208b6f01009ca…

MALICIOUS

PDF

99.9 KB Created: 2021-07-02 12:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 029d02baaf8aaa82110ba09d929f1264 SHA-1: 0224a69e67bfbbe40785c691b5c75ac83cd5d21b SHA-256: 25b208b6f01009ca2ceb9c885e242bedd9eed65b7517d68d8645e62cbd2218f7
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple distinct hosts, many of which are associated with compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and embedded URLs suggest a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/50662362be8d75db6bcde7f70a368438/38080059518.pdf
    • http://adabaskimerkezi.com/upload/file/95632071659.pdf
    • https://langumeistras.lt/i/File/35257109878.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6da76920b---baxemulipoliletu.pdf
    • http://ziconiavip.com/uploadfck/file/fomovokamofewuragikuzor.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3af2afdcab4bc92a00bc40e5834c0de9/kalopiwodif.pdf
    • http://gps-tw.com/CKEdit/upload/files/sosoduziju.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/cdb830bb8ead0b92206c88efa3dd0966/sofak.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb998c2f6a7---texedakasovevofiz.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a55a0596745---sofuvogavupimiwodusax.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/0acf13c7f4210250cd497184e081e9e4/sovezosakupalunaxenexu.pdf
    • http://best-infosystems.com/userfiles/file/61243238418.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4ba4962d1---jesewavilasedowagafeliwi.pdf
    • https://asiarsolutions.com/userfiles/file/76632909486.pdf
    • http://anupbolivia.com/images/files/xexofupemebatuzeb.pdf
    • http://www.findvoters.com/userfiles/file/52445804820.pdf
    • https://agatanorek.com/files/file/zojupebegilarunejuseweve.pdf
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/ff8b7679ca75b81f449c84779fca2d21/pibodobimujikupupokojol.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6026031e5---59010890006.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/17383d96846457e63640187a12a2c3f3/natuwodunininidudofasupuf.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/thod00isjmedjuihrf8hfijh59/73738221332.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609142ee58e17---medigazedewi.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe084b76c---68727388706.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=types+of+referencing+styles+pdf
    • 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_off000122a1.bin
cc23b87690015c69fa5fef2834754fe6cc7252d69d0f5608bcf9eec6e5981c9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x122A1 18128 bytes
font_01_sfnt_off000151d5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x151D5 16792 bytes
font_02_sfnt_off000169ec.bin
f2eeee08facc7d1c9f1024f94544f4e62e48022177e82d6ba49bc98e4db43cbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x169EC 10708 bytes