Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59da2547c298064…

MALICIOUS

PDF

69.2 KB Created: 2021-05-15 00:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c801f5335c72a15a7af9ef23fc1364ac SHA-1: 355bb4712d679bd3097b52b266363bb22d73096a SHA-256: e59da2547c298064bb80b706371775a5b5c5721f1317d09c8678ba6407fa43ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary attack pattern involves luring users to click on these links, which are designed to appear as legitimate files but lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7776

Heuristics 5

  • 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
  • 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://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f809a21224---93887882623.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16076a1c0e71ff---batolejazixafedidoxixe.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/274fcf5db07d8bbc4ebac031fd0289c2/rowol.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a798f3df34---xodada.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608909ff0681a---foteranuni.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728a2a96e34---69935491689.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/fiob8t24suugi5p01v9jrc9pkm/milogifinawezi.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad7e8b8f1e---kaxojojafisag.pdf
    • http://aihyang.com/userfiles/file/gomesex.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/d276e4a31560dcc43bf955a612578a33/43457135448.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7e56929b2---nunukaxokik.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094a744b0337---6117528623.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9629cb54d---88274579213.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=radish+seeds+background+information
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c5.bin
85cdc22a4bc5aa05602da895a5d3231d5956e1e9da03b748006c9f84d39669af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C5 5612 bytes
font_01_sfnt_off0000f3bc.bin
1f835a3f4db11a9e256ca9ed2ad912183ad466f018b6a5523c2376143585c43d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BC 10728 bytes

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