Malicious PDF — malware analysis report

Static analysis result for SHA-256 384852b202f45768…

MALICIOUS

PDF

76.1 KB Created: 2021-02-24 07:41:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 150bd3d5ba5f08ab3932815ae70b856a SHA-1: bba696881c41c4cf5f7b347abdb9059394b9e152 SHA-256: 384852b202f45768b3a2d24e5c83f018315c17e17f0bb42b65ca903c04a055ee
184 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, appears to contain text related to a movie plot summary, likely serving as a lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=last+of+the+mohicans+movie+plot+summary In PDF document text
    • https://rezezeveg.weebly.com/uploads/1/3/1/8/131871466/4258896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_60328e66b5288.pdfIn PDF document text
    • http://gbarb.me/how_to_improve_testing_process_in_agiledcksm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500887/normal_60323cbd78a1a.pdfIn PDF document text
    • http://50offstore.info/jiniv0clmn.pdfIn PDF document text
    • https://xoregofejaba.weebly.com/uploads/1/3/4/6/134651656/wasazozepujowuj.pdfIn PDF document text
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/80743ecb.pdfIn PDF document text
    • http://cosmeteca.com/58662947979aj78c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464078/normal_6013920293f20.pdfIn PDF document text
    • http://marketeuro.pro/can_you_share_someone_elses_facebook_story7ut2a.pdfIn PDF document text
    • http://qupieasy.online/battle_for_donetsk_airportdpfu1.pdfIn PDF document text
    • https://kuwepokipeluzil.weebly.com/uploads/1/3/0/9/130969114/f3560f0bf4579ef.pdfIn PDF document text
    • http://trackengine.host/copy_worksheet_in_excel_2013sfuoh.pdfIn PDF document text
    • http://kayikciakademi.com/hunter_assassin_apk_for_pcc6em1.pdfIn PDF document text
    • http://homearfes.com/statistics_with_r_specialization_githubw0nep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ebb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB5 5356 bytes
SHA-256: cb39f1aeef7a60d79811a704edda7252fe226cd8c75058ab1fe3aeb64870e14c
font_01_sfnt_off0000fdd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD7 11056 bytes
SHA-256: 8c803f5776e9ef23825ed695ffff8d120822ebfd88a5fcf0f590fe794a6a0a2a

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