Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf92ed62955f1ee…

MALICIOUS

PDF

111.5 KB Created: 2021-01-14 05:24:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 69910f456d40f27505637d2088650b85 SHA-1: 9ea55550f56343bf56610732e9cb4687e3000d06 SHA-256: ebf92ed62955f1ee081ff202913974e445175c403b33a37c27c1b2fc1a07e0ac
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The 'SE_SECRET_RECOVERY_LURE' heuristic indicates the document's content is designed to solicit sensitive recovery information from the user. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://trafficel.ru/aws?utm_term=android+sdk+and+platform+tools PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464734/normal_5fb57af72a586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_5fd8d3a061ff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401546/normal_5f9811ee6b7fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_5fa2631305218.pdfIn PDF document text
    • https://site-1180311.mozfiles.com/files/1180311/dragon_simulator_3d_adventure_game_apk.pdfIn PDF document text
    • https://site-1173528.mozfiles.com/files/1173528/74935426019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380214/normal_5fea15e250cbf.pdfIn PDF document text
    • https://site-1177523.mozfiles.com/files/1177523/shooting_metal_targets_for_sale.pdfIn PDF document text
    • https://site-1168448.mozfiles.com/files/1168448/pejakujukukojuzitox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409103/normal_5fad880d7a20f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374708/normal_5f8a40e784778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414687/normal_5fb38e5a190ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425227/normal_5fcb5778c5997.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/belapawerezuju/kirchhoff_s_law_worksheet_doc.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_off0001760a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1760A 5240 bytes
SHA-256: cc131ba4276855ad5558599bdffbbe1953bacaab3bb0cb680c88b35f75209454
font_01_sfnt_off000187cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187CC 12140 bytes
SHA-256: 4b53ef99c5212d119609f1c0e4b7ad657331b3a7941094f9e1512c27ad43e8ab

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