Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebbe992cb5512b3…

MALICIOUS

PDF

79.9 KB Created: 2021-06-22 21:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e8eeccd0e232d136b7614cb200d0c6c9 SHA-1: 2c7bb087a7a2932bae5146dcab8a9794ba7b1acf SHA-256: 9ebbe992cb5512b32a5d78960fb2fe2a879eb06749fe594edbdf31a190ad0101
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's designed to redirect users to potentially harmful content or phishing sites. The document body, though heavily obfuscated, contains keywords related to firearm parts, likely used as a lure.

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://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a3d803ac3f1---lisixubizedipul.pdf In PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/46799cfc017c68d535ab386ce32ed9f3/kituviruxixowebuko.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/nulukixigijusidofekinoxu.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/tozifizatewewetabukezu.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/adee938c09cb90ded751b6a96a8f77e0/nemapixomujibilutija.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/aaf83a34df4f2c285cd7313707c71ace/38852779943.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c73ae20185---41491781375.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbfbef3d09f---wemave.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c957e7e7ee---3842428617.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/4760b70dbe97b77662daf7a50a01ebd8/66369367089.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/mupatuvusowozegubofijige.pdfIn PDF document text
    • https://sealskinz.ru/files/file/fivinefa.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/a9b5aacff73abc833c59e30ae6571edf/4818028354.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/6clethdqr7j1bs2v8aip1kg0ok/4689153357.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/4e93db080af91dd8b2dcc034ae8b2456/64431948122.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607038835680b---jeloxivubupozijara.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/76123976327.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=canik+tp9sf+elite+aftermarket+partsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2E 4968 bytes
SHA-256: a7f358ba6252690d6a4532b0a4f3055b0a020023241abb45dbdfff7d20d6bff6
font_01_sfnt_off0000fcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF7 11520 bytes
SHA-256: 71cb5891f961adc6d0c73a719c8233d75db8c2129ac723796015bfb845615435
font_02_sfnt_off00012452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12452 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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