Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc1bd92a82eb3a2a…

MALICIOUS

PDF

79.7 KB Created: 2021-05-04 03:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b45e2f281189f5a84a1a82db936a1ade SHA-1: f6b5d17579dde0b351ea6b7bdb71acfee0586b0a SHA-256: dc1bd92a82eb3a2a552f25e7c9742c3c83f589468672ae49f3c07ee9711fdace
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious destinations. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score further support its malicious nature. The document body, though heavily obfuscated, appears to be a lure related to camera lenses, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8211

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://aawyx.com/sites/default/imageuser/file/2910329385.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/2cb63c2f3e3180f35440fb641ad6c67f/92066110347.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d01fc2e6fe---73893578216.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876b0dd35da---80862505399.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766d595dd58---nomefoxup.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/8bae999f2b62df10f46c601974de30b2/giwasoveb.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/r62558cgof5a173rug0bllhge6/23915844482.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/1d28330dec0030278fcacf5865b4ab1d/nedemalexugomulanurezitu.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/cd75070b4ef57021e4bfa00083f405fa/jubugoralatuvobubade.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/cv7mitm6t0qrhhin21ljekr4rb/30451174878.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4b03b8916---85496079011.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719a306908a---jadoremima.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ef44b6005---79494469501.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e53523e46b---43962050795.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/df3a24feccb59b189df5bdc7f43000ba/75457393720.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/fa9c3103c1a266ca7d8ebf6fc598c00a/gevifomixanuni.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903e7f98727---10623272464.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=beginners+guide+to+camera+lenses
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112c2.bin
7c0c16d7dff0282de6b7a7c0be8617a89fe2f8a250693cd056deec2b6ec53c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112C2 5308 bytes

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