Malicious PDF — malware analysis report

Static analysis result for SHA-256 c13f21e957e7e1b1…

MALICIOUS

PDF

81.8 KB Created: 2021-05-28 11:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0f5647b5ef369cbfa5085205ab091525 SHA-1: 8c694c0e165c219b33d656132c5e0b7abd213343 SHA-256: c13f21e957e7e1b14af1b7fa396672354d9438a492c90ba920a02feadaefa94b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL, 'https://leonvi.ru/123?utm_term=dream+girl+song+radhe+radhe', which is likely used to redirect the user to a malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the URL and the malware detection strongly suggest a phishing attempt.

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://leonvi.ru/123?utm_term=dream+girl+song+radhe+radhe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366382/normal_603815afa336b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_6061cbc927dae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368244/normal_6000c2b13dd54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404745/normal_604695972ffc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423696/normal_604134198b62e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_606e821ea32fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384037/normal_5fe3fcadda330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498882/normal_5fda05cf36fc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471692/normal_603ec0ecd3c55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381289/normal_60545e8fcd6cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5fe7514912829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467589/normal_600a8c6dd8441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486550/normal_60449f80bd49e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451205/normal_600e998deb26d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494668/normal_5fec56c21998a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_6045651fdf1aa.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/93e41716-6941-42aa-811f-62071b7d2dfd/gasonivesuwatuwirezaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb739bd6-4627-46f9-a888-b225fabb5c7a/93119918514.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DD 5240 bytes
SHA-256: 67d19baf8a0d949a68817ccbcf46df28e9b60730bac10499b522cabdafdd4689
font_01_sfnt_off0001127f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127F 12264 bytes
SHA-256: 2ae0d917bef0477666d4925610f87f7e19a2f94b3c7c2135f9a8e8463b3747d8

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