Malicious PDF — malware analysis report

Static analysis result for SHA-256 602b93aecae58fee…

MALICIOUS

PDF

71.4 KB Created: 2021-05-09 22:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93e8bb44ce752462045a3435ddd338a0 SHA-1: f0592f78c33c4855e753dc2e21898127dd8b44ab SHA-256: 602b93aecae58fee075fd8d8dd27991aaa5dfa9cca3de274e9ae16c4e72b2e50
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised WordPress sites, suggesting a phishing or credential harvesting campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://archism.ru/uplcv?utm_term=ase+guidelines+native+valvular+regurgitation
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/1f46eb0456849c7db8868994bd1dcf3c/54569813067.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083c3cef2fc2---63320539356.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16094693182b86---75518283100.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097299ea11f8---4961740497.pdf
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608419f0dd69f---98300979783.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/3bfb1f743dcfb719454b45f1e8b0cba6/bitipuxixuru.pdf
    • https://electrabicycles.pl/app/webroot/uploads/file/16203604515661.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16081904c8514f---9063549537.pdf
    • http://am-assets.com/aom/magnolia/userfiles/file/51801089444.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073db27b363b---vetuziwojosutasijen.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/95a92088fda9485b95a9627476ce9cdf/kiwujakonunekefevi.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/98f7218e328cb2b105299ee73ce52a2a/gemunapomasegikol.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16090561ae3e94---22554734494.pdf
    • http://simonhoirup.dk/userfiles/file/likupapi.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609182ac3698d---gineranojulejoza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000dccb.bin
653168ffc5e482b8d5a8ae88ed0980b6de36ef6948180354fa51db628c83b6da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 5040 bytes
font_01_sfnt_off0000ee06.bin
7e19e67bef87b69c6976557630e31091fe4daf0faebfcfb676b8f1eb903570bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 10120 bytes

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