Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe25397eda12d69…

MALICIOUS

PDF

85.6 KB Created: 2021-09-05 00:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24f3f6a6ddd5442fb8125f16619960a5 SHA-1: c9a8c5479a0a6f3f331c18a7fe83137f20ed4351 SHA-256: ebe25397eda12d690455b8b497b04f4135637ee09e661fa4de1b4657b28d3a82
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of external URIs and link farms indicates an attempt to redirect the user to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://synerhu.ru/uplcv?utm_term=all+hadith+in+urdu+pdf
    • http://ipayon.com/root/FCKeditor/file/56460151291.pdf
    • https://durgabas.coop.np/ckfinder/userfiles/files/72225134017.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22c3ac90ef---lerasowuseziredomekev.pdf
    • http://grupophi.es/uploads/files/juxilivofuxadagujuza.pdf
    • http://reclameindex.nl/images/uploads/gotereroroped.pdf
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/60808586699.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16103a34c903ea---47716113471.pdf
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/12976351171.pdf
    • http://promador.pl/userfiles/file/lexeloramo.pdf
    • https://zlato-eu.cz/upload/files/88177051199.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/54f9b9tuso3mbb39pfe68cvuj4/tosewawajoze.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef3cae9c82---83456218887.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/38o4ds166ccqi36r1fa8om0gqo/98732247217.pdf
    • https://aneri12.cz/res/file/23816007547.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/tg0l3j0e95mhe7kjfoks86o3li/ratimolo.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/92f91182d6ae0689fc87a45cc93caa7e/wejolesusilagezubejadewe.pdf
    • http://dvif.fr/userfiles/file/fegafufevobetona.pdf
    • https://beysukonaklari.com/ckfinder/userfiles/files/31316197427.pdf
    • http://amphorabeautyclub.com/campannas/file/dexexemoderipu.pdf
    • http://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/93232494330.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/dp9ogp8g33l3cof9cmisoa2du9/xejabofovalezamome.pdf
    • https://semsaesp.com/ckfinder/userfiles/files/monixipetaladuluferu.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_off0000e5fd.bin
8bb8dc1767b914525b8b2306af5209a0aedc386887bace0b2143eed364893762
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FD 10256 bytes
font_01_sfnt_off0000fcdf.bin
389d4d773ef4d5ea8a94e2efd90aea6d09ea293997a55004ebd86bd51677e9ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDF 20252 bytes
font_02_sfnt_off000130d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130D3 16792 bytes