Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e9e48003a18290…

MALICIOUS

PDF

76.4 KB Created: 2021-06-10 10:35:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 21c460d30a3c23e36a8e87ddb597bec7 SHA-1: 045158136a0f403a0d2b1befa38c55f71278165c SHA-256: c4e9e48003a18290589dfa3f2667d2f2ef3bf248161ade0a82ea82739d3ab88d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL leading to a domain associated with link farming and potentially malicious content. The document body, though heavily obfuscated, contains text related to solving problems, suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://inwebjor.ru/pbw?utm_term=solve+by+using+substitution+method PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4383149/normal_60b08a9cb0b35.pdfIn PDF document text
    • https://fukagopesuzidad.weebly.com/uploads/1/3/1/3/131381553/zovifeto_busotejir.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4476938/normal_60b49e4f65bbc.pdfIn PDF document text
    • https://bipalokepug.weebly.com/uploads/1/3/4/4/134492575/3472464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450139/normal_6019ada98b4ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413705/normal_5ff18c17c9417.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puzavofan.pbworks.com/f/tavimumipelape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613b75df-8c63-444a-89ca-9bbe2bc400b4/vulafijuxe.pdfIn PDF document text
    • http://nebapelamive.pbworks.com/w/file/fetch/144539700/23580905520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1bc3a18-f3af-42be-bbc9-a15ec20f1d08/jesus_to_a_child_george_michael_meaning.pdfIn PDF document text
    • http://jetubabup.pbworks.com/w/file/fetch/144544020/sisetelamituxosojalesuxa.pdfIn PDF document text
    • http://rimogeto.pbworks.com/w/file/fetch/144580332/how_to_send_kick_off_meeting_invitation.pdfIn PDF document text
    • http://gogoporiwo.pbworks.com/f/zatikizuzesoso.pdfIn PDF document text
    • http://polujare.pbworks.com/w/file/fetch/144616866/86639035232.pdfIn PDF document text
    • http://vibasuvezuz.pbworks.com/f/gale_outboard_motor_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43526b99-48ec-4662-8164-ab4059499b5a/raymarine_c120_owners_manual.pdfIn PDF document text
    • http://pijipusap.pbworks.com/f/how_to_get_free_robux_no_human_verification_2020.pdfIn PDF document text
    • http://xofitesu.pbworks.com/f/dovole.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144414288/income_statement_balance_sheet_cash_flow_excel_template.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_off0000ebc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC7 5336 bytes
SHA-256: 216c106871a00f055060cd14ade89676126958f719c03b6db04f40c2bd35940e
font_01_sfnt_off0000fdd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD6 10828 bytes
SHA-256: c6a71e5488dc908a778d43a4bdfbfbca1d2b318dac2700a71fb29e3739aa45b7

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