Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc4336cfbf22f63…

MALICIOUS

PDF

31.0 KB Created: 2021-07-19 12:31:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e545384321bd9213af83175a457ff26d SHA-1: e335d36bdbcee9910c4c81251c90e186ef263980 SHA-256: acc4336cfbf22f63491c3fafbce5b6d1fa8533fdeb0f2f27b6594e8a52322af8
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 0.9893

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/479516143/minecraft-free-ios-2021-game-hack PDF link annotation
    • http://sexythings.gr/images/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://sexythings.gr/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://sexythings.gr/images/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://sexythings.gr/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://sexythings.gr/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://sexythings.gr/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://sexythings.gr/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://sexythings.gr/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://sexythings.gr/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sexythings.gr/images/minecraft-free-unblocked_GM479516143.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
font_00_sfnt_off00002787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2787 21868 bytes
SHA-256: e59b7f59e0e6e71bc7719e06678c0111603da02e15a4c5326c065fd8305c46c9
font_01_sfnt_off00005772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5772 18112 bytes
SHA-256: b55c1404a277e69c847ae3cf6ace6563469f03eb0031cfae1db94f462975a683

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