Malicious PDF — malware analysis report

Static analysis result for SHA-256 5434dc627b6aef93…

MALICIOUS

PDF

66.4 KB Created: 2020-11-26 04:11:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9aad4a6c1433013ed62993eeda047103 SHA-1: 03c9a89303a44bca6c1b4e75a6fdc0716359eb70 SHA-256: 5434dc627b6aef93244f53130c6bc0e3a40e86a060cea059fedfc1a038bd1b8a
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL disguised as search results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of an external URI suggests an attempt to redirect the user to a malicious site.

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://trafftec.ru/strik?utm_term=long+john+silvers+chicken+nutrition+facts
    • https://cdn-cms.f-static.net/uploads/4369514/normal_5f890c5a052a9.pdf
    • https://cdn-cms.f-static.net/uploads/4379355/normal_5f9bc8ad8a195.pdf
    • https://cdn-cms.f-static.net/uploads/4460686/normal_5fa51cbe47618.pdf
    • https://cdn-cms.f-static.net/uploads/4427284/normal_5faecfbd156d1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sanekufiwumafo/34846425674.pdf
    • https://uploads.strikinglycdn.com/files/a7ee7a9b-1dbf-4dec-9419-7d07b91167fd/sikafusemalotu.pdf
    • https://uploads.strikinglycdn.com/files/4595ffa3-d6ea-4f22-a4e2-fb5f47ffd8e0/bofimimowi.pdf
    • https://s3.amazonaws.com/rirusozo/mapbox_android_example_github.pdf
    • https://s3.amazonaws.com/tuxutedi/alaye_sitralaye_song_bgm.pdf
    • https://s3.amazonaws.com/zirojopemup/tutorial_dasar_corel_draw_x5.pdf
    • https://s3.amazonaws.com/likadojivivofu/apush_ch_15_outline.pdf
    • https://s3.amazonaws.com/vekodupiwarobi/corbettmaths_factorising_quadratics_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c41b.bin
3a9655958bcc0296eb46614abf4914079f881a83af5f781bf48b138e88f0b153		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC41B 5284 bytes
font_01_sfnt_off0000d629.bin
4134e01707a46ef985373221920e16a1d7a5affd26ddbf1b1131412078ad9db3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD629 11468 bytes

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