Malicious PDF — malware analysis report

Static analysis result for SHA-256 1edaf311b6c672b1…

MALICIOUS

PDF

71.3 KB Created: 2020-11-13 11:57:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3bb87924e2a4fe0466f26136bc743e4 SHA-1: 1ac672a1a71c9bd1669ce2c0eb7721b4903742a0 SHA-256: 1edaf311b6c672b1f0f718efce109dc348f49a844cb04637cd58062851a27dad
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. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL likely leads to a phishing or malware distribution site, masquerading as a search result for song lyrics to trick the user into clicking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://trafficel.ru/123?utm_term=another+part+of+me+lyrics+youtube
    • https://cdn-cms.f-static.net/uploads/4379046/normal_5f912eac28fa7.pdf
    • https://kudizuvawemexol.weebly.com/uploads/1/3/4/3/134307781/4115270.pdf
    • https://cdn-cms.f-static.net/uploads/4386084/normal_5f8cc76090eb6.pdf
    • https://cdn-cms.f-static.net/uploads/4450870/normal_5fa465d91ae07.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mubefula/three_week_diet.pdf
    • https://uploads.strikinglycdn.com/files/f0b52da4-e979-4ecd-b524-2a89ed89e9e4/74237488440.pdf
    • https://uploads.strikinglycdn.com/files/cebb5544-c4d2-4623-b8dc-740a3d8eeddc/44011435882.pdf
    • https://s3.amazonaws.com/donarepemi/pufozadulaworujujurelob.pdf
    • https://uploads.strikinglycdn.com/files/b30e0b01-13a3-4b8f-af3d-764567c9ff90/libros_para_nios_gratis.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_off0000dba6.bin
ef72698e1ac153088353cdf9beb9ec8277c48835bfd07a0929f7a7c31c14dfa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA6 5484 bytes
font_01_sfnt_off0000ee2f.bin
281629813beb99398cf9b02a4a1b1b752a4be0650caadc3984c92796412fb0f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 10132 bytes

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