Malicious PDF — malware analysis report

Static analysis result for SHA-256 829729307a52bb4a…

MALICIOUS

PDF

74.6 KB Created: 2021-04-17 03:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 1592832879cbbe17ae6014d8c5d35327 SHA-1: 6d2a1141d63ad35d263a5040f11d069d8642fe5b SHA-256: 829729307a52bb4adda89a51e2071c2cce114dd3cbb2e42f06b60d0fbe29ddbc
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be a lure related to a common search query, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=can+you+replace+the+battery+in+a+roomba PDF link annotation
    • https://cdn.sqhk.co/zavilisuga/jeSuigM/simcity_buildit_cheat_codes_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/kedetofido/ififhee/99875989799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_60339ccfd76a3.pdfIn PDF document text
    • https://cdn.sqhk.co/kozutani/MiiBUia/7653562410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_601a3c9ba661e.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/eVcjiQK/vulizelogabulegi.pdfIn PDF document text
    • http://store50off.info/nuvutewesesozofojd2e61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450260/normal_600b342453af6.pdfIn PDF document text
    • http://memakumiri.iblogger.org/nipavinirilixe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426425/normal_606c5ff46706e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496204/normal_605f892a0b6ae.pdfIn PDF document text
    • http://netzamka.ru/idle_knights_mod_apk_1._1._238j8yd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zabezotep.epizy.com/information_technology_project_manager_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/blur_background_photo_editor_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/what_are_the_values_of_lifelong_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/dudunagixexorunimabuvaruk.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/52970764715.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/luxuwotadibiko.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/math_worksheet_place_value_tens_and_ones.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/64103652904.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/21750238460.pdfIn PDF document text
    • http://riperuzitino.rf.gd/back_to_school_activities_middle_school.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_off0000e6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EB 5144 bytes
SHA-256: f7a26f887e66eed4d80e21226c48b2f260b2be4d1a3915731f9ba7af2e0b0201
font_01_sfnt_off0000f840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF840 10692 bytes
SHA-256: 38c567cc1c1e2f22ddc4fde84e9bf0b2355dde47685f978952bc96cf15f020e8

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