Malicious PDF — malware analysis report

Static analysis result for SHA-256 88353d3a0ad318d7…

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 07:00:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bda76bba0d095b927c371b01ac17465b SHA-1: 975e7eb3840fe5ac35566c54a07b30f116dfac46 SHA-256: 88353d3a0ad318d7a09c0f694d694ba2037f09fcbea04dbb6231b055109c25be
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to websites offering game hacks and free in-game currency, such as Coin Master spins. The primary link, https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-link-2021-game-hack, is highly suspicious and indicative of a lure for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-daily-free-spins-link-2021-game-hack PDF link annotation
    • http://knjiznica-oroslavje.hr/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-place_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004977.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4977 24924 bytes
SHA-256: 92153b3ee11501bebd2250f69818013297bf8d54e564d245ea45a3be7e3eff68
font_01_sfnt_off000081df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DF 18880 bytes
SHA-256: 4ccb81aabfc378a65bbb004da1df6276046c1b1923188410bd025f5007717b79

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