Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ca8cfa52189850…

MALICIOUS

PDF

76.9 KB Created: 2021-04-07 20:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ebe81a5b441224dbbdfbbb165143e6f SHA-1: 5df39280d4ee69e0a70ced391df0de0aa5ed4315 SHA-256: 36ca8cfa521898507eb67c775b5c5fa6d6b81feed928ae9e059ba10308b4b6e3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and likely phishing-related. It contains a large number of external links, suggesting a link farm or redirection mechanism. The primary malicious URL identified is https://soxebez.ru/123?utm_term=charisma+microfiber+sheets+reviews, which is likely used to host or redirect to malicious content.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/123?utm_term=charisma+microfiber+sheets+reviews
    • https://cdn-cms.f-static.net/uploads/4495858/normal_60318250af023.pdf
    • http://rujewazaxijaza.sportsontheweb.net/68500_answer_key.pdf
    • https://cdn-cms.f-static.net/uploads/4426679/normal_5fd6c6733d52c.pdf
    • https://cdn.sqhk.co/wadalibituge/jdhdEjj/thrifty_shopper_outlet.pdf
    • https://static.s123-cdn-static.com/uploads/4458615/normal_5fc7a22d6accd.pdf
    • http://tapopapebesawu.getenjoyment.net/dr._adonijah_ogbonnaya_books.pdf
    • https://cdn-cms.f-static.net/uploads/4383921/normal_6046de379e694.pdf
    • https://cdn.sqhk.co/nezusoxe/hbzghhe/screen_recorder_pro_apk_no_root.pdf
    • https://cdn.sqhk.co/gefimiwotux/KheVFgg/vosakonexijerokez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_d65b1aaf53aa46d993c057189951ef1c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b9db6c2c-4fda-4222-a2a4-4edc0c490a61/do_your_best_try_your_best_friend.pdf
    • https://uploads.strikinglycdn.com/files/868624d4-bea4-4963-be6e-6a1341aa3ae1/labudiwupijojenazabez.pdf
    • https://d67926d6-99fe-48a4-938f-95006fdf2de6.filesusr.com/ugd/21d82e_4ef3731f739f4172aae3fefabeb35a01.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b88ba8d6-088e-4179-a7b9-7d42b0621275/misufifesupalu.pdf
    • https://uploads.strikinglycdn.com/files/e051c903-0f36-4f60-aee3-488b5e440010/nokanejule.pdf
    • https://uploads.strikinglycdn.com/files/3de47f16-b286-4575-971d-aad236cb8d0c/purekebipedivaduvukekinod.pdf
    • http://tagijonegularol.myartsonline.com/89079674.pdf
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_ab7294c7f19e46d49804efb5a2890002.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4620f352-a3ad-4d45-8b95-90a69f8c76ab/8996792709.pdf
    • https://uploads.strikinglycdn.com/files/22d93d31-8466-4275-b978-233a74c09289/janekovaroxomip.pdf
    • https://uploads.strikinglycdn.com/files/26b2b8f3-3c76-4c5c-b3d8-72b6c1941c53/how_many_queens_in_a_52_card_deck.pdf
    • https://uploads.strikinglycdn.com/files/259e0ad9-2ee4-4eff-af20-5ef4fc37dfe0/negeveduk.pdf
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_13450eb22f104b57bde18fb65cf4cf40.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_off0000ee34.bin
171afb3a8c2d72745a1ffd22759dea5adac61a01c2a5d554190875d908367ccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 5284 bytes
font_01_sfnt_off00010015.bin
f11382ee50f8acc73a7f6bb65f9e4970cc4da716f25f993e184b4db9af8ede63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10015 11052 bytes

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