Malicious PDF — malware analysis report

Static analysis result for SHA-256 156bb77dd7fb477a…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 07:03:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c84a4c71650a6fdf8239a66ef84d4fdd SHA-1: b685390207ba2e0259827fac2135eb1f02c31b18 SHA-256: 156bb77dd7fb477a1e40c76371c8f675718ddbdbc35554345c615b19658e3c0b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with game-related hacks and generators. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the document body and heuristics point to a phishing or malware distribution attempt via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-18-game-hack PDF link annotation
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-how-to-get-free-membership_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/robux-scam_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-obby-2021_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
font_00_sfnt_off00002ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED7 22456 bytes
SHA-256: 30755abc3775194a8da6957e5e71d91e6e2b3f9f239d33acd3de239c67ddd927
font_01_sfnt_off000060a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A3 18800 bytes
SHA-256: 42b1edbda45666aa43fb845e47c0ee4bb2a3578eb12926efdde45fbac39b2991

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