Malicious PDF — malware analysis report

Static analysis result for SHA-256 976f39c18b219a02…

MALICIOUS

PDF

90.8 KB Created: 2021-03-27 18:28:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44b07f9dbb1bcc852104552409dafd2a SHA-1: ddfe4454c5d4ea65e2409cc876fd87e5b1e103ad SHA-256: 976f39c18b219a02e6ea807aeb5b130e75b31a0b22efc45dcdf26a30566691a2
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, contains metadata suggesting it might be a disguised document. The presence of multiple unknown reputation URLs further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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://resalured.ru/strik?utm_term=yamaha+rx-a700+specs
    • http://sdek-24.cc/physiology_of_behaviour_carlson_free_downloadicurn.pdf
    • https://cdn-cms.f-static.net/uploads/4428062/normal_603aab65b05ee.pdf
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/660d931fd31d61a.pdf
    • http://wwbook.org/mackie_1604_manualysndy.pdf
    • http://helplnstagram-confirm.com/hp_designjet_5000_pricel34v2.pdf
    • http://golosa-spasibo.ru/xiser964lb.pdf
    • http://sovolox.getenjoyment.net/luvejisamexu.pdf
    • https://static.s123-cdn-static.com/uploads/4473322/normal_5fe27867ee538.pdf
    • http://zijafanovidiz.sportsontheweb.net/57299200787.pdf
    • http://tenipimutav.mywebcommunity.org/xunujabojezunutovafuv.pdf
    • https://cdn-cms.f-static.net/uploads/4376850/normal_604cd9264566b.pdf
    • http://pinegobojefo.getenjoyment.net/iso_9001_internal_audit_training_online.pdf
    • http://jamotovoxut.mywebcommunity.org/ragizisuxadij.pdf
    • http://jafoxidulez.mypressonline.com/persepolis_book_notes.pdf
    • http://zutumufedige.getenjoyment.net/gizuzadiwalamuvuxoja.pdf
    • http://dugarudewemudo.sportsontheweb.net/24187725839.pdf
    • https://jomufoxubibad.weebly.com/uploads/1/3/1/1/131164047/780eb84bb8101.pdf
    • http://latitekiwa.scienceontheweb.net/cisco_access_point_configuration_step_by_step.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/73674487-1bda-4bf7-a180-5bc3fd7d30f2/new_star_trek_movie_series_in_order.pdf
    • https://uploads.strikinglycdn.com/files/71281871-b673-453e-9461-506ae5285617/technical_analysis_of_the_financial_markets_john_murphy_ebook.pdf
    • https://uploads.strikinglycdn.com/files/129b32ca-318f-482a-a080-1be2376f3fe0/xukikubuzinevuranomedip.pdf
    • https://uploads.strikinglycdn.com/files/1d1f06db-6b1b-400d-9159-815c8fefd44e/what_does_credible_deterrence_mean.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119e5.bin
a62520d2312292e46a396ce38aea079fd87a72a825412a0d1b78894cd267b185		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119E5 4868 bytes
font_01_sfnt_off00012a6e.bin
f276e6fce75c5deb77fe5189f8195413ba826733cc9c7c56dd5cb83407f05a89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6E 10872 bytes
font_02_sfnt_off00014f91.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F91 4324 bytes

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