Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ff6183a7e15613…

MALICIOUS

PDF

65.2 KB Created: 2020-12-24 08:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5b48bcb3ba50bc46d06d0fa2978a0b5b SHA-1: 42aa4c5778a54333c4390c404b2b87514ce4628a SHA-256: e8ff6183a7e15613a6bdc802a3c8fe833db3dca1d93a32a827b850b3621d694c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that is disguised as a download link for an application. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the presence of a suspicious URL and the overall classification suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/strik?utm_term=stacky+bird+apk PDF link annotation
    • https://cdn.sqhk.co/suwezuzifu/gegggjC/72766733414.pdfIn PDF document text
    • https://cdn.sqhk.co/jalizovi/0W3Ghay/pebijab.pdfIn PDF document text
    • https://cdn.sqhk.co/wediximewoza/eQhfkgj/kovasuxubalomikazupi.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/Gagd5ic/sky_whale_online.pdfIn PDF document text
    • https://cdn.sqhk.co/sijoputolu/5ichfGv/32733760917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450003/normal_5f9f322ad35df.pdfIn PDF document text
    • https://cdn.sqhk.co/dusimefosix/YLiMgf3/incremental_definition_oxford_dictionary.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/b0181eb2-f070-4a87-8049-8fc9d7c21a9b/figuring_foreigners_out_a_practical_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/generic_quote_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/vw_jetta_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/navuretivazudezetinej.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_off0000c2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FD 5268 bytes
SHA-256: a56ebdc73acbf803d520aa41aef56ddc85a5207369e81187b6bc6bdd13b63dad
font_01_sfnt_off0000d4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FA 10512 bytes
SHA-256: 54108abf6a982fb54bfdbd6040ece8ffcb4442fc5366abae2bbcc9d767134c14

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