Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40e2ecde188ae4c…

MALICIOUS

PDF

72.6 KB Created: 2021-02-28 00:02:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f08e6f0746dd20c6cd2166993da6b906 SHA-1: 163a43d7d0046f03d5098f84a8cd8e7a42db05d0 SHA-256: d40e2ecde188ae4c996fb663edabb8c6b905316ac4fff8620744e9f506dc1bc5
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a malicious payload or phish for information. The document body, though heavily obfuscated, contains text related to mechanical engineering, suggesting a lure to attract victims interested in that field.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=is+mechanical+engineering+in+high+demand PDF link annotation
    • http://nyvelsets.online/applock_pro_premium_apk_download4dkrs.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/dhjgcjb/bijutobebat.pdfIn PDF document text
    • http://pasetbs.xyz/software_project_deployment_plan_templatexkb5t.pdfIn PDF document text
    • http://jadebey-x.com/926951831505mxpy.pdfIn PDF document text
    • http://powerhdniy.space/37879060291nagew.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/fodose/72146211551.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/introductory_chemistry_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/bounding_box_map_format.pdfIn PDF document text
    • http://xugibomexepef.rf.gd/gexukalupojeluwuzidegajem.pdfIn PDF document text
    • http://xujalupa.epizy.com/index_match_between_2_excel_sheets.pdfIn PDF document text
    • http://juwiwigepumer.rf.gd/fundamental_accounting_principles_16th_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/xoromiwirigu.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/9525494216.pdfIn PDF document text
    • http://bavipilebevim.epizy.com/action_replay_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/94616492760.pdfIn PDF document text
    • http://puretuwedeva.epizy.com/periodic_table_free_in_telugu.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_off0000e17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17A 5288 bytes
SHA-256: a3cbe78fe5d5f42035ddc7fdd4a6133dc7c3fe7ad166fc0fa6e267f78b9230a3
font_01_sfnt_off0000f343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF343 9980 bytes
SHA-256: eec1c3de842c8149c4cf3796b53b4835ad6d46f3cd0e47d1cc7912db716e61d6

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