Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f04aed53220340…

MALICIOUS

PDF

68.7 KB Created: 2021-01-16 10:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c6d97d43042550701df6a1e96ae0bc9f SHA-1: ee828b00fce20b0b985b85d567b33b87a60ae6a2 SHA-256: d7f04aed53220340345029ae91a421fbcfd947d727c124f5319456be58fe8238
104 Risk Score

Malware Insights

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

The file is a PDF that contains a link disguised as a download for 'five nights at freddy's 3 apk full version free download'. This, combined with the ClamAV detection of 'Pdf.Phishing.Trojan', strongly suggests a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the presence of an external URI and the overall context point to a malicious intent to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=five+nights+at+freddy%2527s+3+apk+full+version+free+download PDF link annotation
    • https://site-1233197.mozfiles.com/files/1233197/bohol_travel_guide_blog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470226/normal_5fda0b6433261.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466175/normal_5ffc539f0b281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471475/normal_5fb2e748d83bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414494/normal_5ff856a30ca27.pdfIn PDF document text
    • https://site-1168144.mozfiles.com/files/1168144/real_car_driving_experience_racing_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477138/normal_5ff9fdf248115.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450160/normal_5feefa7a7e8ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sojaxub/ascenseur_pour_l_chafaud_miles_davis_free.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/azure_cloud_tutorial.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_off0000cc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC69 5772 bytes
SHA-256: 417577ef943afff90b48e0521fa45f34b1428deb8ffcd088e55f54d29dff294c
font_01_sfnt_off0000e039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE039 11156 bytes
SHA-256: 725585943d7582706591a0feb9e1eadb8f6ea3152af10c33d004e2fb65dd57f8