Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a4e8e17f23982a…

MALICIOUS

PDF

79.5 KB Created: 2021-03-18 04:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e408d649d17c8d897153b09ce60cedca SHA-1: 75ec2e767dc667e03cdf4a0d541b3d0895f7d440 SHA-256: f4a4e8e17f23982aa1763c86e6bbc7846fa234a5be0867539675a06c9ba63b09
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule and ClamAV detection as Pdf.Phishing.Trojan. The presence of numerous external links, many pointing to potentially malicious or SEO-farmed content, suggests a phishing or malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to drive traffic to external sites, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/wix?keyword=quechua+dictionary+peru
    • https://cdn-cms.f-static.net/uploads/4480880/normal_601e3386b17c7.pdf
    • https://cdn-cms.f-static.net/uploads/4448096/normal_6035e691692f2.pdf
    • https://doxuginuf.weebly.com/uploads/1/3/5/3/135346615/2900835.pdf
    • https://vebuxevofarina.weebly.com/uploads/1/3/4/0/134013543/557baf88d24.pdf
    • https://cdn-cms.f-static.net/uploads/4413017/normal_602c22f7b3e8c.pdf
    • http://datovufes.scienceontheweb.net/28359453733.pdf
    • https://static.s123-cdn-static.com/uploads/4465924/normal_5fef10849d9b9.pdf
    • https://cdn-cms.f-static.net/uploads/4414847/normal_6024bcd0d6d51.pdf
    • https://muputobiga.weebly.com/uploads/1/3/5/3/135308906/vogusizalagewudapa.pdf
    • https://junezafebu.weebly.com/uploads/1/3/0/8/130874287/refuloxapofi.pdf
    • https://xufaparada.weebly.com/uploads/1/3/4/0/134017939/8a83c570be71e7e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d6f61f97-ed2d-4752-a7fb-fed2d705696c/how_to_reset_nanostation_loco_m2.pdf
    • https://uploads.strikinglycdn.com/files/9f66b5f9-12f8-4da9-a99b-84909a32bf4a/tifav.pdf
    • https://uploads.strikinglycdn.com/files/4ddda6bd-fe9d-4e3b-816d-6eef3fd51c76/is_the_maze_runner_movie_appropriate_for_10_year_olds.pdf
    • http://memamawu.onlinewebshop.net/plantronics_voyager_legend_bluetooth_headset_schwarz.pdf
    • http://kisalonokexiwi.atwebpages.com/what_are_the_7_types_of_water_pollution.pdf
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_bd6dce65ed7c4850a63b15a53eaba6b7.pdf?index=true
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_f6b52dc77d5345bd8052e21c0b0a4dc4.pdf?index=true
    • https://s3.amazonaws.com/ravuxudibure/catia_software_for_pc.pdf
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_98c08671fb95488785233a873675e484.pdf?index=true
    • https://s3.amazonaws.com/daraniwekamidir/best_grill_cover_for_weber_spirit_310.pdf
    • 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_off0000f66d.bin
15fd84c6ab01d0e2648c62cf98e51b6d9283258ef7a15a2661afdae83c10e159		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 5112 bytes
font_01_sfnt_off000107d4.bin
50fbaa73e910747bf56e32b613169c0ae6e4204ead1707bedc08b7c3337406e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107D4 12880 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.