Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb94d296b4d4b6af…

MALICIOUS

PDF

83.9 KB Created: 2021-03-20 19:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b45f131978a9a432288564caa73282f SHA-1: 7e17a300701660e22394253878658fd1767416e4 SHA-256: bb94d296b4d4b6af7edc851cf2542b9d89adec30eb6701578917ec1b2a99b7aa
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that directs users to a suspicious domain, likely to host a malicious payload or phishing page. The document body, though heavily obfuscated, appears to be a lure related to book recommendations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=what+are+the+best+books+to+read+for+12+year+olds
    • https://cdn-cms.f-static.net/uploads/4386620/normal_60226f69baf56.pdf
    • https://cdn-cms.f-static.net/uploads/4415327/normal_602c34ec455e6.pdf
    • https://cdn-cms.f-static.net/uploads/4405184/normal_601437a361300.pdf
    • https://cdn.sqhk.co/tefulobesa/ia1jegK/jepagalufavolukadikole.pdf
    • https://cdn-cms.f-static.net/uploads/4382406/normal_5fe7aae979434.pdf
    • http://kegujusotuk.iblogger.org/68138910904.pdf
    • https://cdn-cms.f-static.net/uploads/4401697/normal_6043100ea6246.pdf
    • http://vulifux.66ghz.com/xafulajasameriged.pdf
    • https://cdn-cms.f-static.net/uploads/4469128/normal_6026a544762cb.pdf
    • https://cdn.sqhk.co/delotijuw/FYLPgc3/jijugifumuvawiretofomakot.pdf
    • http://relibafogat.sportsontheweb.net/bissell_proheat_2x_revolution_pet_pro_20666_reviews.pdf
    • https://cdn-cms.f-static.net/uploads/4444356/normal_605401922f6ab.pdf
    • https://cdn-cms.f-static.net/uploads/4490133/normal_6027f72457e7e.pdf
    • http://nikibolerobika.getenjoyment.net/62946507082.pdf
    • https://static.s123-cdn-static.com/uploads/4388279/normal_6002db7ec88b6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://detekoxinusogux.epizy.com/firaxetepam.pdf
    • https://uploads.strikinglycdn.com/files/bee46ab4-0ccb-4ac0-9e42-af4df82a07e9/78394370556.pdf
    • https://uploads.strikinglycdn.com/files/35edb697-dc4b-4d20-b687-70b35e803199/funeb.pdf
    • http://xigasew.epizy.com/how_to_turn_on_dyson_ball_vacuum.pdf
    • https://uploads.strikinglycdn.com/files/ae1ecaa3-3ddf-4dfb-8dc3-036a1491985b/craftsman_16_scroll_saw_manual.pdf
    • http://fuwejuxof.rf.gd/41165799515.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc28.bin
c78405084296a5c7c91381ec3a5cd40b56e850ac9f82d20f7c9f0eeb0977015a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC28 5132 bytes
font_01_sfnt_off00010dc8.bin
9753d0c495944bf179ffb5f37ef34a0b581e3b47b6256d41c6f7604794cc9139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC8 10664 bytes
font_02_sfnt_off00013201.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13201 4324 bytes

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