Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7be254cf3b2ba9…

MALICIOUS

PDF

79.8 KB Created: 2021-05-20 18:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d75ae0d9a85b364bcd74df4cdaaef444 SHA-1: 5053d2fa939dda93b8d721e077595b691c2c8858 SHA-256: 9d7be254cf3b2ba93cdf6ce2c628496ab85370d188cbba4106c77972851dd6ca
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/strik?utm_term=kinds+of+adjectives+worksheets+for+grade+4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393889/normal_601c9a0f3e6a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459164/normal_5fe58c10e4ff6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457838/normal_602f994b00faf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427095/normal_602e49189b89a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474218/normal_6031c98053937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413966/normal_5fe6cd93350db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494166/normal_60195f01eeae6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fc8269235f1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_6034694145635.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411701/normal_5ffb1604c61ec.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/nisoxow/99538683703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eaa8238-7a2c-4bb1-8755-9c790d05bfdf/what_is_the_best_orientation_for_a_house_in_perth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20bf5018-d2e1-4914-a496-af70d62833af/how_to_make_a_wellness_recovery_action_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84e9922e-01aa-41c3-a80c-cbcb2eca34e8/setuxoroxer.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/dopizogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa58d9c-d08f-4665-b864-a9e7a5406767/47251504184.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/bbg_stronger_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867db7e7-103d-4436-919d-9296e53acb90/noweke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/538807b4-5712-4c2a-befc-ba0fdcfd6162/pusawetibunaxafufuken.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_off0000f9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C0 5600 bytes
SHA-256: 5d863cebb86bf5eb4bcb6dfac11a36e2dbc54d7b06d147e5eb92b9f5eab9981a
font_01_sfnt_off00010ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE9 10768 bytes
SHA-256: b1871198a7280465c9c31de7d8aef7f91c3cab6a3fc7123cb834a2ccb2400f0b

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