Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c1b12110cd6880…

MALICIOUS

PDF

68.3 KB Created: 2021-05-19 01:37:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 974c2085f476de1884cc6c80813868e5 SHA-1: 564cde2f1a361734f0445fdf3c76c65b2a5e6669 SHA-256: f7c1b12110cd68802bd8e2d677ce58680318a3c4f4327c36b230316d81bafb49
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting itself as a movie download lure to trick users into accessing compromised WordPress upload directories. The embedded URLs suggest a tactic to distribute further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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 https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/2432e1c0de5aac2a8480028e86e9af81/kuxasijivatemiwikipex.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/265a1f76663127e4226ab6fe8c1dfb07/sazoke.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/15604c9c03c3584e56dc8f8132f7fa0e/kujasapurazowalaf.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/i09ausa6dlf11n88pqn4cl9t20/xoxokowarupo.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/c1b33721ec7f662fb4bd86ee9e1a86b8/84820913451.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/48521be3ccc41d9edff3a11a37f69a14/mozufigavimum.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/gg7s5uc3o0c3mbp5dli92baipi/66738531969.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ca6836b57---badijefazelopamigape.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/3ctip5va8asb3dogcsvr9ahsab/12362999614.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/0afc7fb88ccd7be5179afd3d357e68dc/sorupeza.pdf
    • https://binarbaidfabrication.com/public_html/userfiles/file/luludubosevopufemafovarip.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/831e174e1ced941f1e56de7a32b43626/vizidusukavilivorus.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/c7f79ec385aabad2506bfc24116533e2/detud.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/7b01e0f617e6d2514dedf274c417dde5/xesiboxenuzabewiwidaro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=nonton+film+horor+danur+3+sub+indo
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d15b.bin
5768400a495801734f0d0b80774db362e83d9efe3efed8cc210f961a14307ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD15B 5420 bytes
font_01_sfnt_off0000e398.bin
bafe29dca0e5481a6256793dc6952e5e5218415b5e47eef00bbe43edfe0f7985		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE398 9616 bytes

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