Malicious PDF — malware analysis report

Static analysis result for SHA-256 99018e28d83e7502…

MALICIOUS

PDF

37.8 KB Created: 2021-06-27 13:15:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 38875eb035d758d6ed5752975bdd2cd8 SHA-1: d3753c7f67cc76e4987fcf1cf5e7fe982d96bae0 SHA-256: 99018e28d83e750285117cf851e9215ead49fae1ef79d25d8257301bea9cf327
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, identified as malicious redirectors and lures for game hacks and free items. The primary URL, http://netcdn.co/app/431946152/www-roblox-com-free-account-game-hack, is flagged as a malicious redirector. The document body, though partially corrupted, contains references to 'free generator / game hack' and 'free account', reinforcing the lure tactic. No scripts were extracted, but the embedded links are the primary mechanism for delivering the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/www-roblox-com-free-account-game-hack In PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/pokemon-go-free-coin-promo-code_GM1094591345.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-roblox-no-survey_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/pokemon-go-free-3d-model_GM1094591345.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-phantom-force-hack_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/tiktok-free-online-games_GM835599320.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_002_off00003a99.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3A99 22792 bytes
SHA-256: 2493f033e2d78390a025c443a4c44ec7af20a229a095e17d8d48635c581d5a61
font_01_sfnt_off00006d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D93 19516 bytes
SHA-256: d7fd4cdd01f09cabd63ccac1a091113a1ee9c60b53f347827ec180da0f252af2

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