Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc89a11a5ad7555…

MALICIOUS

PDF

69.2 KB Created: 2021-02-19 18:20:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 24641b1eb0f3a865671e79fbc7a0b7e2 SHA-1: 5b7a227c37dfc7122709e93324af54b06c1c1041 SHA-256: bbc89a11a5ad7555262160a2a53c0f3cfea09c71d664e06e4f48c025b865e653
156 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to a 'starcraft aluminum boat for sale' lure, and a critical heuristic indicates it requests recovery secrets or private keys. An external URI was also found pointing to a suspicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://druttle.ru/123?utm_term=14+starcraft+aluminum+boat+for+sale PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446782/normal_5ff52cc2db8e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482018/normal_60048fd4f0774.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/cSANmhe/defenders_td_origins_4pda.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/cShfBij/dino_hunter_deadly_shores_hack_version.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/hj1xHum/racing_simulator_cockpit_for_sale_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/jowowibow/hsNjgjj/kejubunetobosejutukoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_602ec87fbf74e.pdfIn PDF document text
    • http://christmas-gift.ru/android_16_and_17_dokkan35udz.pdfIn PDF document text
    • http://sberpodarok2020.online/tank._io_unblocked_at_schoolc67s3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490542/normal_6000b053926d5.pdfIn PDF document text
    • https://cdn.sqhk.co/nidaruzada/chjmWjb/14000299577.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528260/normal_5fdef2808dcd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477137/normal_602bf625dcb67.pdfIn PDF document text
    • http://autoport76.online/yellow_belt_lean_six_sigma3uyu4.pdfIn PDF document text
    • https://cdn.sqhk.co/wisaputal/iAWjcid/xuvitesafomisajejob.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/fEyQZii/puvos.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/lijopavexanuse/brochevarevarura_telugu_full_movie_in_movierulz.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/cds_exam_full_information.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/fci_answer_key_2019.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_off0000d077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD077 5212 bytes
SHA-256: 38d3f4a41c034cee5ac6b1cb86a3393e1aa3301738246cca2467884eae0602f7
font_01_sfnt_off0000e225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE225 10948 bytes
SHA-256: 38641b94d71b5d3e6ff290054acd2f5c02dd27fe889b757121be4d8ee9b65a7b

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