Malicious PDF — malware analysis report

Static analysis result for SHA-256 583bb3513f281a69…

MALICIOUS

PDF

34.7 KB Created: 2021-08-01 09:26:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 425be4479571a9ebd900cf54e0ba7c4b SHA-1: 1d9f128ec5adff5d3a9636dc7f2f1856aa9e51e9 SHA-256: 583bb3513f281a6972208c085b7cd9f2712c9c0023a960ed31ac742f8275f02b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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 http://netcdn.tw/app/431946152/roblox-hacks-2021-game-hack PDF link annotation
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/free-tiktok-video_GM835599320.pdfIn PDF document text
    • http://elearningmtsn2kotatasikmalaya.com/__statics/gudangsoal/files/roblox-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30C6 22876 bytes
SHA-256: ec556ac9ec2dfd4df888e8ce0afa086ffd3e440bab2274a72735954ec4cc3162
font_01_sfnt_off000063e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E6 18772 bytes
SHA-256: f404702c6ebb54461c96635651d1cc1e8daf221ec2b2a1d14d4d71b0dc657f1c

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