Malicious PDF — malware analysis report

Static analysis result for SHA-256 17473f5eb85b7622…

MALICIOUS

PDF

66.1 KB Created: 2020-11-25 15:02:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5f937addcdf01590f9fbcd6c0446bfef SHA-1: cf616b3efd7ebb1a9445413bddce41791de1dda0 SHA-256: 17473f5eb85b76220c97f488c6250e48caf12fe18dc74ed9c807744fd929b833
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URL and the document's theme suggest an attempt to trick the user into downloading a malicious file, likely related to a game. The presence of a download button lure further supports this phishing attempt.

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://trafffe.ru/aws?utm_term=game+naruto+shippuden+ultimate+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f88da1996188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378607/normal_5fb761a7b0a8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503692/normal_5fb2f6af7d102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f880f8939c05.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/lomiwexuva/95901487996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0608421e-5479-43d7-856b-1af00af8f096/woluxikipefuzeduluzodaf.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/calling_down_the_sky.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/42006043817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7769c76-590e-476d-b893-a7f5951a0e07/31139341699.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/maya_cinemas_pittsburg_ca_showtimes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53a50048-eb65-49b8-aed1-42c694ecb562/93537311231.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/29832936648.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_off0000c72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72E 5292 bytes
SHA-256: 37c248c7be69e7221d2c3cfb3133f69a3b358a3931f2694dbeb8883db20dd25d
font_01_sfnt_off0000d904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD904 10236 bytes
SHA-256: 9b83bdbe3f4a5b677f38d43350d3fea3382276484cbb88bfd297f57a4e7ae7b3

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