Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee74aee3c4a9564b…

MALICIOUS

PDF

75.7 KB Created: 2021-03-15 11:17:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb1a2b979fda525d6599521891dcb21c SHA-1: b0745bd62e892c9a8eda0e1f94edbf6e87b9d192 SHA-256: ee74aee3c4a9564b3e88949b446dd833ea98c5fa7482f7cca2479759cb0fa4f3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a mass of external links, suggesting it's part of a link farm designed to redirect users to malicious sites, such as the one found at 'https://maypoin.ru/wix?keyword=earth%2527s+best+diapers+size+4'. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely contributes to the malicious functionality by facilitating redirection or further payload delivery.

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-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://maypoin.ru/wix?keyword=earth%2527s+best+diapers+size+4
    • https://jafoxexaromomev.weebly.com/uploads/1/3/5/2/135296472/435b92d.pdf
    • https://static.s123-cdn-static.com/uploads/4366359/normal_5ff379d3e018d.pdf
    • http://wamuwosola.mygamesonline.org/26365344409.pdf
    • http://urolog.xyz/90610484084uwcir.pdf
    • https://cdn-cms.f-static.net/uploads/4407306/normal_5fd9006151359.pdf
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/eece5ea3fbd.pdf
    • http://vumogegotawugub.mypressonline.com/ridebivu.pdf
    • http://kijofizovurisos.medianewsonline.com/matlab_tutorial_for_beginners_image_processing.pdf
    • http://indonesia2health.online/63427321341yg87f.pdf
    • https://fumuzuwuwuwupu.weebly.com/uploads/1/3/0/9/130969925/c5a80c98c9d.pdf
    • https://jivenikovo.weebly.com/uploads/1/3/4/3/134308789/ruwuvuxusixelir.pdf
    • https://xidokuwu.weebly.com/uploads/1/3/1/4/131453793/sobifezu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7b216be3-3937-48cf-9ac3-79fddd73cae8/sales_questions_to_ask_interviewer.pdf
    • https://uploads.strikinglycdn.com/files/c046d3e9-3fb4-48c9-bd80-00e34c4c2967/computer_network_technician_course_online.pdf
    • https://uploads.strikinglycdn.com/files/121e6c10-a383-4509-a4c7-09ae92c4327c/dopomidupibujif.pdf
    • http://bitines.myartsonline.com/41258240083.pdf
    • http://vafitinupisojud.onlinewebshop.net/gewozupikuvokosodevu.pdf
    • https://uploads.strikinglycdn.com/files/febac2f1-147d-4d39-a133-0b18b5c84bb3/baby_girl_names_that_go_with_elijah.pdf
    • https://uploads.strikinglycdn.com/files/85347636-ac27-41c2-a36d-5ae68e53674f/the_complete_guide_to_day_trading_by_markus_heitkoetter.pdf
    • https://uploads.strikinglycdn.com/files/77239601-d8ae-41b3-addd-578c84f9f014/71823111652.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_off0000e90d.bin
04ad715eb0913d4c2bba57fd513a1d08fff194eafd57ac987792c24dc90900fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE90D 5284 bytes
font_01_sfnt_off0000fb06.bin
8151326f4f402cf2855301654b4acde79c6cdd98b22f6a74f3a6d055f45cc4df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 10916 bytes

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