Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85739e3682e4091…

MALICIOUS

PDF

70.3 KB Created: 2020-12-26 14:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ed15989a6a16a58f005ab388fb4401b9 SHA-1: 9693db1a200788deaa2b636023c22a416ccdaedb SHA-256: e85739e3682e4091ced3d89226b28e4ca8bba95b96d2bdce703acde7dcece168
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains a URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The embedded URL is likely used to redirect the user to a phishing site or to download a secondary payload.

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://trafficel.ru/aws?utm_term=turn+off+background+app+refresh+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370307/normal_5f88421df2281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f94bde29b933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470412/normal_5fdc375905826.pdfIn PDF document text
    • https://cdn.sqhk.co/kezulegol/dM4haih/pulse_oximeter_readings_normal_pulse_rate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459774/normal_5fe6d0bfa5bfb.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/legesiliv/bendix_king_kma24h_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/roadkill_cafe_az_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/75322300567.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/49311554697.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2880cb3-2c15-4c18-905a-aa253b13e04b/knifepoint_ridge_glitch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb96cf4-dc72-4bf3-ac37-366182798cdb/how_can_i_recover_permanently_deleted_emails_from_gmail_after_30_days.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6013d7a3-d26e-4ed0-838b-b76225eff17d/12208857332.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/84532513879.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_off0000d487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD487 5536 bytes
SHA-256: 9bdaf491ba0b3329fdea6d063bdd9e6bf6af665ba1aee875f1dc0d6e311eb5f4
font_01_sfnt_off0000e752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE752 10948 bytes
SHA-256: 707b9de7d4b779bf52ea305c9ac6a1a63185d3e77027eb7c304102588f972dfb

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