Malicious PDF — malware analysis report

Static analysis result for SHA-256 215140407a87ae9f…

MALICIOUS

PDF

84.2 KB Created: 2021-07-21 04:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 52acd2207b966d67c696c6e1208bf107 SHA-1: aee66e9ed9122956d31e2d0c908c17cd16ef1df8 SHA-256: 215140407a87ae9f0f02435c14bb39f96757dead691c671ed171b36c05797f6b
184 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites or raw IP addresses. This suggests the document is designed to redirect users to malicious content, likely for phishing or to download further malware. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090198be5fc8---lesituzebivunuzuv.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609401ec469d3---48722569294.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f31abb55d---dogif.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c01d7e793---78670857132.pdf
    • http://twfbs.com/ckfinder/userfiles/files/pisalasemuwoliguguro.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095340a254f8---xupizagupakuzaj.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2febc0445---3622089991.pdf
    • https://marmarases.com/upload/ckfinder/files/37300414463.pdf
    • http://spoilersmensgolfclub.com/clients/865201/File/kovigosud.pdf
    • http://www.look4job.gr/images/_user_na/file/24292045179.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc9f048fef---bexefat.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160af7aa90916d---58584808491.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/e6c59907f60e67f70cf22e204dcecb5c/pesesixeweligeziw.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105101130526636.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609697c82232f---silelufebopenagikokamowo.pdf
    • https://ludifrance.fr/userfiles/file/626577387.pdf
    • http://idolyokocho.com/js/ckfinder/userfiles/files/56279434943.pdf
    • http://neonatal-surgery.ru/userfiles/files/ramafotunozi.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/3feb3ad655ef55d6f348da9ed023c971/nagapekibejale.pdf
    • http://119hero.kr/userData/board/file/sulapalufigiletewafu.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/02e6feb386e62d5fb9c7dfb13177503c/8043944363.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=rwanda+official+languages+french
    • 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_off0000e5d0.bin
141145225f64a261fea6ebd2817835b3152e9cffec4e61bc06535ebffa016161
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D0 10888 bytes
font_01_sfnt_off0000fec4.bin
8f20755615911124bb73f1dd8fc5f95556b8984cd08380b51c712c9e680e14cc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC4 17664 bytes
font_02_sfnt_off00012bab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAB 16792 bytes