Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22495bae3456bbd…

MALICIOUS

PDF

73.9 KB Created: 2021-01-15 07:19:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0433801575b29856e66d2a6d1b57763b SHA-1: 16bf01a37b9614eec50ee0deb7cd13346f4f1962 SHA-256: c22495bae3456bbdd2cfcd2d72e4cb76a5b812358a70adbeeda343e7d3e8222b
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://traffset.ru/wb?keyword=charm%20king%20game` suggests a phishing or malware distribution lure, disguised as a game. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to a malicious site, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://traffset.ru/wb?keyword=charm%20king%20game PDF link annotation
    • https://site-1168006.mozfiles.com/files/1168006/tojosezu.pdfIn PDF document text
    • https://site-1176587.mozfiles.com/files/1176587/29049243233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426814/normal_5f9d515ba72cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468531/normal_5feb80ad21807.pdfIn PDF document text
    • https://site-1166068.mozfiles.com/files/1166068/50266382913.pdfIn PDF document text
    • https://site-1174809.mozfiles.com/files/1174809/large_cell_phone_for_elderly.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5fbdf5faae177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_5fc0971e96ab1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382972/normal_5fc5f72ed1d41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DF 4856 bytes
SHA-256: 336be78262c1b539c7368dfcadf6578ae109ecfac071299837ba04b71259824f
font_01_sfnt_off0000f734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF734 10516 bytes
SHA-256: 4e3adf6f92eb2a7e2ec4ba0b02b367746c9b2fdcc3dc40e1a7f0410baaca892f

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