Malicious PDF — malware analysis report

Static analysis result for SHA-256 030842d8e8fa17a0…

MALICIOUS

PDF

74.2 KB Created: 2021-02-19 23:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 794317ca3453ebc37a1852efd99d66e9 SHA-1: 4992f5c49f597796db22043ecbc9442cc79dccf1 SHA-256: 030842d8e8fa17a0a7ef04957fc6b1ec1ba3c25cc5ba90ebe5549184dd0fe962
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a domain associated with phishing and malware distribution. The document likely exploits the user's concern about outdated software like Flash Player to trick them into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://bologen.ru/strik?utm_term=flash+player+no+longer+supported+chrome+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5fd77a9036a92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421210/normal_5fc677335b024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413111/normal_5fe7dcaedfd48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466659/normal_5fcaf8b270f20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_600a918630da9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374373/normal_5fd1d0e2e6197.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462038/normal_5ff7d42f79f8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478393/normal_6010aae83d0be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412761/normal_601a1c7877020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445531/normal_6008a02800221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5fe699b23b369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448550/normal_600b123b47a75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_601aa888ac1d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487625/normal_5fcf35c9c755c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_602f6ee199d48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_5fd39aff89103.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/bulujono/76548902493.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_off0000e374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE374 5816 bytes
SHA-256: 9d22b6d696bae94854b63d49a381bcaeca0321cf583b2d6fbb68b50ed8a60136
font_01_sfnt_off0000f726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF726 10832 bytes
SHA-256: 1295c2c279b2d3b820fe6161b4d25e87431b6f2d4b7d2e8d0b497a5cba5bb2fa

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