Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d51250dfb7d86cc…

MALICIOUS

PDF

36.1 KB Created: 2021-05-21 15:46:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1b44cdc12fcef80dc1f0d44a3237d885 SHA-1: ef4808d2411847301943c4c6e163a9b6b70f440f SHA-256: 5d51250dfb7d86cce9d946adc4b82fceb4eba17138347810fc37ac505b5c833c
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 0.9508

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 https://netcdn.xyz/app/835599320/is-tiktok-free-to-use-game-hack PDF link annotation
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man01kuningan.sch.id/__statics/gudangsoal/files/play-coin-master-for-free_GM406889139.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_off00002e4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E4E 27820 bytes
SHA-256: c755a48ccecb5a8e2ad0f1020435652419beed29697ad01a94d30ecaa15381b1
font_01_sfnt_off00006dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAD 17644 bytes
SHA-256: 64d4d49e1254e5cb924f38655c14d3ad028ecff57352d42b38c9956f6d5a4696

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