Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47ccd21dc1cad04…

MALICIOUS

PDF

173.9 KB Created: 2021-02-23 05:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a2ed64412627d82fdbaee69b9f2de24a SHA-1: 12c60801b339a93414ede873ad24501e0894600b SHA-256: e47ccd21dc1cad04f068f4a42c864dfb8bdceef954591fd246c8304c7c9d991a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a search result page for educational materials, likely as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of an external URI and the high confidence scores suggest a phishing or credential harvesting attempt.

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://druttle.ru/wix?keyword=eureka+math+lesson+14+homework+answer+key+grade+2 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383916/normal_5fe1330b391b7.pdfIn PDF document text
    • http://wozutujetotox.iblogger.org/vubewugewifuwura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496014/normal_601bcfa944f43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471096/normal_5fdcb52e76793.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/gateme/vigenuzuwok.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/tefegelodik.pdfIn PDF document text
    • http://nixivirevoso.rf.gd/punaforekefereleleda.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/adele_when_we_were_young_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/tobid.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/barbie_dreamhouse_adventure_game_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/94055717184.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/catanzaro_calcio_1983_formazione.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/13251833815.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_off00026fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26FE3 5728 bytes
SHA-256: ab6da46ef960c64920778188d72795800008e89b2dee54490a8a6752c00d2959
font_01_sfnt_off00028362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28362 11436 bytes
SHA-256: aa3d7481050dfe2e7d902a09bc713a6b2100e639f0f59313981acf3cb8c50fc9

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