Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fbc456e7b420a5d…

MALICIOUS

PDF

68.4 KB Created: 2021-01-21 16:32:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a0bd50f967108e227d75324804d94638 SHA-1: b90d685c79fafeea781f5a8df2a9a9bb7fbac833 SHA-256: 3fbc456e7b420a5d94e09f6629d13a8df0a7cac40bba2d7469dfd4d9b4846c1e
96 Risk Score

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/123?utm_term=profit+worksheet+4th+grade PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372737/normal_5fca33fa59be8.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwutu/4vjhicr/windranger_arcana_2020_release_date.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5f89993ede3e2.pdfIn PDF document text
    • https://site-1177405.mozfiles.com/files/1177405/angry_birds_epic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5fa4a3558ca25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450624/normal_5faa04eb62083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446166/normal_6003d0f945722.pdfIn PDF document text
    • https://site-1171754.mozfiles.com/files/1171754/90s_hits_rock_alternative.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/fakuguvil/samexatobavadatizu.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/mofubiv.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/jevuvivazamamubizakopuzit.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/2365691797.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/tamil_calendar_2019_january_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/axially_loaded_members_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/chotta_mumbai_malayalam_movie_scenes.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_off0000ccc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC5 5384 bytes
SHA-256: 3dc949393f056e5ed79bd24dbbdf7bd48ceda37ea0e1337c09ac3829a3c8a998
font_01_sfnt_off0000df2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2B 10972 bytes
SHA-256: 6715ed683cc21a726ec56605564c1ff93dfe6dc438fde9686c57787f38ea5a42