Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fd5303a12388cc…

MALICIOUS

PDF

69.1 KB Created: 2021-02-10 04:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2a4a238b3a5f6082cc4cfa519fc675b0 SHA-1: 88e7edbfc1b3efd25a1f58d31301084933de8c5c SHA-256: 80fd5303a12388cc5bb2fd00d1a91a834c91a3437a510be53db7faa99fe853a4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, particularly to domains like 'jacksth.ru' and 'goloturasituj.66ghz.com', suggests it is designed to redirect users to malicious sites or download further payloads. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/aws?utm_term=principles+of+applied+research+methods+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366034/normal_5ff0272397a5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416125/normal_5fc88b4d774b3.pdfIn PDF document text
    • http://goloturasituj.66ghz.com/besoserof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405651/normal_5fcaaff89cc85.pdfIn PDF document text
    • http://xonibiz.22web.org/material_safety_data_sheet_of_sodium_hydroxide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489050/normal_6019ac20736f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449193/normal_5fd687c21c6a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/amharic_keyboard_for_computer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/kitchen_cabinet_hardware_placement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/cedar_point_map_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/research_paper_outline_template_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/bantayan_island_travel_guide_2019.pdfIn PDF document text
    • http://didopip.epizy.com/61647011347.pdfIn PDF document text
    • http://fobifuv.epizy.com/36863479223.pdfIn PDF document text
    • http://nodikisiti.rf.gd/8185306173.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/zoruwimivekova.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD330 5396 bytes
SHA-256: 13ef2a7c436e742495c3ad90b314efe02763daf4f6418bbef3dc506d00ae18e4
font_01_sfnt_off0000e55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55D 9864 bytes
SHA-256: 74f3d00f05140cf3e4c76db1e0e06a30d1492be1ffbc1fc486927cf918b6d7b1

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