Malicious PDF — malware analysis report

Static analysis result for SHA-256 b885598575b3b0cc…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 21:40:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 37ca9116d609df81378ff7bae73f65be SHA-1: 7cab7403cc93d1fb8a9a351770b8653072b3329f SHA-256: b885598575b3b0cccfbf860af2882467732856f62f53c8d56cf3a6ee665c32cc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs that lure users with promises of free in-game currency and hacks for popular games. The primary URL, http://netcdn.tw/app/406889139/free-coin-link-coin-master-game-hack, is flagged as a redirector for game hacks. This suggests the document's purpose is to trick users into visiting malicious sites, likely for phishing, scamming, or malware distribution.

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/free-coin-link-coin-master-game-hack PDF link annotation
    • http://perpus.polbitrada.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-no-scams-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-play-paid-acess-roblox-games-free_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-card-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/comment-cheater-sur-roblox-franais-sur-jailbreak-levels-airdrops_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/ben-toys-and-games-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/http-roblox-hack-mobilegenerator-net_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/mad-city-roblox-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/image-free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/robux-free-ilimited_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-adidas-clothes-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-no-human-verification-no-scam_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_off000033a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A9 23080 bytes
SHA-256: 4f949157565c0d9501e01758825ff6974e6089781c9db71bd60c46d9b4d9915d
font_01_sfnt_off00006768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6768 18168 bytes
SHA-256: d6978680c0337f8af4b60576fe648ab9af53f36a416ef1a32498e40032286442

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