Malicious PDF — malware analysis report

Static analysis result for SHA-256 b552b08508792447…

MALICIOUS

PDF

88.1 KB Created: 2021-02-25 08:16:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cceb0832deb13c90b8ceba3dba27e70d SHA-1: 80389b78621df791e5d37590725782c7c8dcc38b SHA-256: b552b085087924472dda656bb086110df1bef5826f176ec3479f5fd097cf2d8f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to host or redirect to a malicious download. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into downloading and executing further malware, aligning with spearphishing tactics.

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=iomega+home+media+network+hard+drive+software+windows+10 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385012/normal_600470625f79c.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/john_deere_d110_service_light.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417122/normal_60373b98de30e.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/dedupipapekot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471230/normal_60269bdd45345.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486041/normal_5fc98c719e7b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409122/normal_5fe640e2d49ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503279/normal_5fe821329be77.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/4217304762.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459805/normal_5fde125ee92f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480891/normal_6015c6984143f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_60200c14b8f13.pdfIn PDF document text
    • https://cdn.sqhk.co/zuwiwejagub/gdjghcp/kevuzanematero.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487184/normal_5feb3dc7651ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403539/normal_600bf58368f19.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/wumodukubaru/google_analytics_assessment_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/bulletin_de_paie_maroc_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/wezubatakifipudex.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/xixuzebofutuzegi.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_off00011886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11886 5636 bytes
SHA-256: f72044978cd0ea02a12368a8b0d020c31cb8e1a2e5126211fd4ec2f3bfb7bc99
font_01_sfnt_off00012ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA6 11420 bytes
SHA-256: 788bec284da733a77c57f21734d7cbcf033bf6365bf50a7656a1698c4ff708b0

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