Malicious PDF — malware analysis report

Static analysis result for SHA-256 3766ca711d956fbc…

MALICIOUS

PDF

75.4 KB Created: 2021-03-03 11:47:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c7e5e8dbef9a1e3f133ccc4873f1e0e0 SHA-1: f5044ce26fe6441e1264a459eb5baddca257ae09 SHA-256: 3766ca711d956fbce3a6ef41a0e19995be75821f9472bcf1d5df31beb40ca208
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a malicious website. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://kuzutuzo.ru/award?keyword=what+is+significant+coronary+artery+stenosis PDF link annotation
    • https://cdn.sqhk.co/memenewo/c3ggjig/tisugasezomomobasufuj.pdfIn PDF document text
    • https://cdn.sqhk.co/lizuxutagisu/iihg6gd/57981146371.pdfIn PDF document text
    • http://metumudape.iblogger.org/free_html_css_templates_two_column.pdfIn PDF document text
    • http://servicesforsupport.com/pisotowifevukulifodato77kbn.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/bulujono/79479840883.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/poe_crafting_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/modazajaxabonipinov.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/23493785729.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/wufalokibomabajuvogotowi.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/android_studio_change_app_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/ditixogekane.pdfIn PDF document text
    • http://riremeg.rf.gd/solitaire_cards_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/que_significa_agregar_en_informatica.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/house_on_mango_street_audiobook_free.pdfIn PDF document text
    • http://xapopifatudafa.rf.gd/bajrangbali_image_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/94013783905.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/fatokokawurukonetodef.pdfIn PDF document text
    • http://guwidovu.rf.gd/ramosimugudojufumikigare.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_off0000ebf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF1 5228 bytes
SHA-256: 53434c67ce145a2262eecd2d9bceddbdceac42e3969a9417672968db1c018143
font_01_sfnt_off0000fdd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD0 9972 bytes
SHA-256: 1972eea63d0c66e3c627af183da3d378d69ca397b791aa4556d25ecd2a8833f1

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