Malicious PDF — malware analysis report

Static analysis result for SHA-256 03882ece605444b8…

MALICIOUS

PDF

64.0 KB Created: 2021-05-31 03:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e42397cc6c9ba7b427d94e0e25ec899 SHA-1: 182e1ebc888c8df5937398602684aa73ca44f802 SHA-256: 03882ece605444b86a6f66e95476ec29492b3bdd9c3a855f61f16a24bfba4d2d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier output strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Mod master for minecraft pe pc', likely a lure to entice users to click the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7911

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crysiq.ru/uplcv?utm_term=mod+master+for+minecraft+pe+pc
    • https://alihuata.com/userfiles/file/ridikudetu.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbe3288c76---96749981136.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075482509d68---12190013068.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2d20baccb---10783353399.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821e34ae587---bapife.pdf
    • http://angelescare.com/userfiles/file/puvovitaneravefenigoxuv.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb50545d3d---58925778701.pdf
    • http://rld-carbon.ru/file/toborifunilusipomaneta.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/q93137cplob4e9tsjhga813s2q/gumozudu.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/m9u20d2sckrpq2uae7mqhvh453/81973758806.pdf
    • http://georgekoldun.com/var/upload/file/diguwasodalimuzo.pdf
    • http://arunimaflavours.com/userfiles/file/13446355725.pdf
    • http://amon-syotengai.com/userfiles/file/83325384951.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba80b7fa72---verewufowitikimoneli.pdf
    • http://appletechsolutions.com/userfiles/file/42094565383.pdf
    • http://alkanboya.com/files/file/%5C/81965433807.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7c4f5ab6b---lubanumerivujekulesi.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c63c5d0e6---dosopuzurikaziwodil.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/23073603483.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2d1.bin
585e9f10ebc2787a1798086a2c29fe61022f0422529a1e1de41c211ecaf6d623		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D1 5276 bytes
font_01_sfnt_off0000e4a9.bin
3105d4b46358e4cb334796d22757beb84f34af005157099a55bd2048220729be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A9 5812 bytes

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