Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e1b23cd0d1c1bcd…

MALICIOUS

PDF

65.3 KB Created: 2020-11-25 15:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f38268731239c63fd3af94571359f9b5 SHA-1: bac9aaf7f6bbbb3cb421570b0996563a3d100b04 SHA-256: 6e1b23cd0d1c1bcd8cf209ee8f29c263e95a2acb225f1fc704619ff77143ad15
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, indicating it exploits a PDF vulnerability. The embedded URL `https://traffset.ru/aws?utm_term=crystal+report+13+runtime` likely serves as a download link for a secondary payload. The document's metadata suggests it is disguised as a 'Crystal report 13 runtime', a common lure for users to open and interact with malicious files.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/aws?utm_term=crystal+report+13+runtime PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5fbb310c7fe6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412394/normal_5fb834af1b09b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450427/normal_5fa7d934ea983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_5fa8ad17ae3c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462093/normal_5fa49f315425a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370294/normal_5f8ece5bef52b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470535/normal_5fb4f035d7473.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f54578-5e85-4d2a-894a-19832bc54b65/90602770496.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/40272181076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31de2ef3-9616-4e03-9c36-be21b77fe550/bazekosup.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/technical_interview_questions_on_dbms.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/cloudformation_iam_policy_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0801af42-1671-47f2-80a4-d7fe1e874fce/american_girl_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/4240358669.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/xosijosurizasifudi.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/lolifalafo.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_off0000c383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC383 5188 bytes
SHA-256: b3011f055365536772b5bbae44b112aa9e7575b89f0809fc972e959d9bf6c8da
font_01_sfnt_off0000d51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51F 10388 bytes
SHA-256: 06a0e39a25bcf8021dbc3993f7636269286d7a9ae1ee607af08903e010934569

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