Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3242867df6d363…

MALICIOUS

PDF

81.7 KB Created: 2021-03-13 17:27:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad83b00c160ac26f13de219e78a892c3 SHA-1: a71b7ff114edf86ca510d4b6ff31a4cdd59f92ea SHA-256: 0e3242867df6d36314353c392f6371e4a7ff6f821d2904ed559a3377ba912a65
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and the 'ML_NYX_PDF_MALICIOUS' score. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The embedded content, though heavily obfuscated, suggests an attempt to redirect users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/wix?keyword=julius+caesar+timeline+birth+to+death
    • http://kewatupu.scienceontheweb.net/8990893426.pdf
    • https://cdn.sqhk.co/tesolivu/ibicggd/save_the_fish_game_online_free.pdf
    • https://static.s123-cdn-static.com/uploads/4417834/normal_5ff6608bf2280.pdf
    • https://cdn-cms.f-static.net/uploads/4370737/normal_5fd7de04f2f2e.pdf
    • https://cdn-cms.f-static.net/uploads/4389582/normal_60386a64386d7.pdf
    • http://sozaxesugoj.mywebcommunity.org/59475243677.pdf
    • https://cdn.sqhk.co/dipewoduge/Y8tgehg/suzabev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_9f769b58b3c5495381a17333ae4b56d2.pdf?index=true
    • http://luvetux.myartsonline.com/honeywell_wifi_focuspro_6000_user_manual.pdf
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_9d3b74aea036494fa4f449efe9f47aa9.pdf?index=true
    • http://nowageg.onlinewebshop.net/agile_project_management_with_kanban.pdf
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_ed7905da887642c5815b2cfcecb72698.pdf?index=true
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_b9101cdcaa5640d2a5a90d616dc9df95.pdf?index=true
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_2cd0499a88294dc19c7c743876759825.pdf?index=true
    • https://42cc6f6d-9125-48bc-bce4-1bf15f49b1be.filesusr.com/ugd/7c30af_9c4ffaaa03524479b66d0f5908ea25f9.pdf?index=true
    • https://4cd5eafb-d261-4666-a528-29b55b1676c1.filesusr.com/ugd/8dde66_c3f41bd4d0734e55991a7b30a0332e02.pdf?index=true
    • https://s3.amazonaws.com/wupiwupiwot/dugonodujekijajije.pdf
    • https://s3.amazonaws.com/mivokozibu/liseferala.pdf
    • https://s3.amazonaws.com/bivanud/samsung_sm-t530_specs.pdf
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_2acb7d11407a4b3bb1b864f6d931e15a.pdf?index=true
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_b23b4d43b5d3447b9e66c9620e17d2ab.pdf?index=true
    • https://s3.amazonaws.com/zetituri/ronazugizak.pdf
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_7d8529b92eef4af0b1c0ee0f590b59e6.pdf?index=true
    • 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_off00010329.bin
048d5625843def2ae9f3cb9ab487272cd7a0ed347214e12741e91fd2480e4bd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10329 5308 bytes
font_01_sfnt_off000114fe.bin
54f89c696f5100b96087ec8fe543b6e33869a36e3791491325f3e433149e45d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114FE 10728 bytes

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