Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c60484c4f7705d…

MALICIOUS

PDF

61.3 KB Created: 2021-06-04 01:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 239f94e0e0b9eba2189b398d3d684dd8 SHA-1: 82084327714b8ef51d3d3637670df7aea7cb52d5 SHA-256: 49c60484c4f7705d9fb2a4aefafd23bf652d2b17a853d7542290b38591c41f74
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 of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8123

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://amblamy.ee/upload/file/sakasamope.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/l3k2v9um68nj9tvv0kb15loqb7/falalevuwatarokisafijixux.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832bf9ac06f---40290542061.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/bd123d97c8190e18b73c653e028fb3f4/17190353031.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d631b090f3---lepinikafabunolikutazax.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a276f2fde6---woxitufewelebujefevo.pdf
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/runonegetiju.pdf
    • https://x-software.cz/data/file/11181145561.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/a23d5d8ef1ee85ab08106e8eec586086/bodufuduputelu.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/kotagotevijatape.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/f3fd12d34334f01fc8fad472fe541c30/bafitetetosazobekoxamev.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4adf13dda---biritefadotumifobiv.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809ce981d19---48791879965.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/o40rkp6800nabb2g5aat6fkko0/8078660441.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/c6b2ee640bc668eb6af553671859547e/37003609192.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=best+oil+for+vanguard+engines
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ab.bin
caf370187e57092aa927fc0da14657d1ed221dc2893c298d192a41406fe3ecc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AB 5184 bytes

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