Malicious PDF — malware analysis report

Static analysis result for SHA-256 92bd4f230d87fb47…

MALICIOUS

PDF

71.7 KB Created: 2020-11-14 08:08:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b62e93a9f883f01f5261c69bea8ea261 SHA-1: d247c0c7e4f0244d0143968966f22c43f2df2c88 SHA-256: 92bd4f230d87fb47401994d66cbf61890ab9aa2322cab43c6d64b5ae9bd0fd78
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/strik?utm_term=kuch+khatta+meetha+lete+chale+mp3+so In PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_5f8fef0306a2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f86f5f0af993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420431/normal_5f9f330b242a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b204105d-a94f-4f32-a6ff-64d4614b8605/sprinter_game_hacked_200m.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/video_editing_software_no_watermark.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/pros_and_cons_of_a_indirect_democracy.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/35278270139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec4d1267-19d1-47ff-b184-dc0898cdbed0/varusifavalax.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/ib_biology_book_oxford.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/proceso_de_investigacion.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/ash_like_snow_nightcore.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/verizon_wireless_early_termination_policy.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC230 6828 bytes
SHA-256: 04978e195d87d6ca4fcf28adb92bfb1c934b84e04d279863863eca841ba0b2c1
font_01_sfnt_off0000d8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C1 5272 bytes
SHA-256: 878edd4647fc9fdcde56361b9017f2b62a0d8781c3fe6ecaa1d37d8840f3f128
font_02_sfnt_off0000ea8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8E 11568 bytes
SHA-256: 6e440bdda9a4fd28eedf680098bbc5ee7a0cb2b0bdceb790b162feba4d70147c

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