Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3166c2db4d10309…

MALICIOUS

PDF

74.2 KB Created: 2021-04-04 12:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ce934ed57b530af5e676aad92a94e50 SHA-1: dcd056916a21bf2b94006b8c97123d060a71367e SHA-256: e3166c2db4d103090af779e2175e241d40e0dabba20f295de34b187c85a98da4
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'kuzutuzo.ru', which is likely a phishing or malware distribution URL. The document body, though heavily obfuscated, contains keywords related to 'remote control military helicopters for sale', suggesting a lure to entice users to click the malicious link.

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
  • 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/wix?keyword=remote+control+military+helicopters+for+sale
    • http://blockingscenery.com/7309179709uop9l.pdf
    • http://romeoplanet.club/61404503599i886j.pdf
    • https://cdn-cms.f-static.net/uploads/4444622/normal_605baf6e7fc96.pdf
    • https://cdn-cms.f-static.net/uploads/4401538/normal_601462503e4d2.pdf
    • https://cdn-cms.f-static.net/uploads/4487647/normal_6052b16094a6d.pdf
    • https://static.s123-cdn-static.com/uploads/4393353/normal_5feeac2aa9519.pdf
    • https://static.s123-cdn-static.com/uploads/4367643/normal_5fedc9c3b042e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zunaporam/tapuxedo.pdf
    • https://s3.amazonaws.com/tabobujimo/nobuluxaxudodetonosepuvu.pdf
    • https://s3.amazonaws.com/jeduzizonox/engineering_mechanics_statics_and_dynamics_14th_edition_solution_manual.pdf
    • https://s3.amazonaws.com/lurutopobi/solving_quadratic_equations_by_factoring_answers_key.pdf
    • https://uploads.strikinglycdn.com/files/b59ab318-e0e4-49db-99b9-1c6be8375e91/abraham_lincoln_biography_kid_friendly.pdf
    • https://uploads.strikinglycdn.com/files/2541df41-f9e6-46dd-96ec-b09537d5be7c/89793115273.pdf
    • https://s3.amazonaws.com/bupaxomu/hyperplane_seminar_report.pdf
    • https://uploads.strikinglycdn.com/files/80b892aa-99df-44fd-a6d8-49004f68f339/72823483147.pdf
    • https://s3.amazonaws.com/sesafefanulokam/idylis_air_purifier_iap-gg-125_reset_button.pdf
    • https://s3.amazonaws.com/libosokune/36053912371.pdf
    • https://s3.amazonaws.com/wemazun/cheer_up_charlie_piano_sheet_music.pdf
    • https://uploads.strikinglycdn.com/files/d1caf338-7688-457c-93b8-4dbb25e6a140/8705526783.pdf
    • https://uploads.strikinglycdn.com/files/ede22e57-b04d-437c-83ff-070dc028f9e9/71942771373.pdf
    • https://uploads.strikinglycdn.com/files/8fe49075-3888-4490-9f02-9ece379a7750/gre_exam_practice_papers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28a.bin
4a88578f20db2ead8f979ba984a11ad8ea67e8a4fc151e8026526e9e0b601a89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE28A 5364 bytes
font_01_sfnt_off0000f4aa.bin
c62d3033c4ef731aa662dc63aeed7047f51858fe8ac6bee33d986f45e91ced6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AA 11656 bytes

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