Malicious PDF — malware analysis report

Static analysis result for SHA-256 be55bd8b8f708d16…

MALICIOUS

PDF

33.3 KB Created: 2021-07-05 00:18:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8a327a2ac7cb65f299c329f957a942a7 SHA-1: b97f7ed7c205ca58dbefc219953acbb7d6a62ebb SHA-256: be55bd8b8f708d16cfdaa1a6c9133da78a7c65b733773e87eb447a0533647d71
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector. The document body and extracted URLs reinforce this, pointing to sites offering game cheats and hacks. While no scripts were extracted, the primary attack pattern involves luring the user to click a malicious URL, likely leading to a further download or exploit.

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/406889139/coin-master-firebird-card-free-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/dev-console-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/follower-fr-tiktok-free_GM835599320.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/exploit-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-no-password-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/citizen-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/apx-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/egg-farm-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-roblox-para-volar_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/best-free-horror-game-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/growbux-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-frre-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-youtube-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-word-search_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-no-code_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/rbxraincom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-roblox-dll_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-snow-shoveling-simulator-cheats_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-no-verification-or-survey-100-real_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_off00002d65.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D65 22436 bytes
SHA-256: 5ec76636c750ea06c92529944f539f1e00249b7679d11d6e6974c87344dc706b
font_01_sfnt_off00005f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5C 18328 bytes
SHA-256: 2cf099823a9c0df98c55330e895f61e0661279471d18d6960b52a287134192b8

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