Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6fc8f384363b4dc…

MALICIOUS

PDF

94.1 KB Created: 2021-07-06 17:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2609d02c64f2bf08bf34d2f476c23631 SHA-1: e7fd58762f79fdcac3be88206ff3e0ca577af546 SHA-256: e6fc8f384363b4dc203b2a00d709aae90e169980e067be5610d1367b2f19bcbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised CMS uploads and disposable hosting, forming a link farm likely designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the link farm suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/p15jt7nns7v16sjfm91uknkf18/mogojunekutadonenofudika.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/17fddb0f9459ccb6ecd1797f8c331608/xumovusonani.pdf
    • http://kirakuramen.com/uploads/files/kukubefikafoxex.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/cd596de01eil6tcfh64p4jmeqm/58802945157.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5ab054377---21376210073.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/45b0168caff1dcf5f804311d7b4358a4/zitegopi.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/74e67f3a8874338f2fe4532cdb3df232/kurixefu.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a947d846e---tozogegibof.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d522362dd9---kujopegamoreninogo.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/295048e17da0f13fe293f3003cda1bc6/76766177447.pdf
    • https://organicfertilizerproduction.com/d/files/sumiz.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/lktg30e0aja9jlcon58c1fntph/78089221492.pdf
    • https://doktor-ara.com/userfiles/files/77570220089.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/e95b7ebdd6ce0b319e801ea8d4f1823a/xawigelatadejine.pdf
    • https://bravo-hk.com/userfiles/file/davodinoduruj.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cde30eebe---gezowavixegetopulor.pdf
    • http://b-solutions.net/userfiles/file/vovafaragisizegeludarela.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddbecb0f99---33198708982.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c45ad590031---zapomesasodomodalepekuxo.pdf
    • https://evergreencans.com/userfiles/file/15015406880.pdf
    • http://namngonviet.vn/user-/files/limetatokuxukubevuxe.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/679b1b1de6121f43174fe588e688f8db/tuxanaju.pdf
    • http://reversetheclocknow.com/ckfinder/userfiles/files/tekutaj.pdf
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/af5c899318453be33598e2b9d456a070/pelubuwebozakujep.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=organization+theory+and+design+3rd+canadian+edition
    • 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_off00010d2d.bin
ef17497eaf6e9b1f4de8cb23d17d57c02441cbece1ee89cfb7bb2f904d1c713c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2D 10976 bytes
font_01_sfnt_off00012689.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12689 16792 bytes
font_02_sfnt_off00013e9b.bin
274742c44b17f6425d125991b8708f5435f152d146e86ee223f31b65c17777aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9B 16960 bytes