Malicious PDF — malware analysis report

Static analysis result for SHA-256 5903f71487c9264d…

MALICIOUS

PDF

35.8 KB Created: 2021-07-06 18:30:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9f77dbca010c37bdf45b0b67ba2af59e SHA-1: 753672f37e3b192a1fd6651ac4f75614a3fbefab SHA-256: 5903f71487c9264d5a61817272f4034bfea084f10928d8fbd9ccc891b513df64
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/free-robux-without-verification-game-hack PDF link annotation
    • http://bob-reid-music.com/uploads/files/files/free-robux-master_GM431946152.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/roblox-immortal-hack_GM431946152.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/dungeon-life-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/roblox-exploit-hack-october-2021_GM431946152.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/free-robux-card-codes-deutsche_GM431946152.pdfIn PDF document text
    • http://bob-reid-music.com/uploads/files/files/free-robux-on-phone_GM431946152.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
font_00_sfnt_off000031a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A5 23048 bytes
SHA-256: e9e573593defb6d6a4fc617fcd21b7c820ee6a452188ffe4be051f7d4874059f
font_01_sfnt_off000065b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B9 19436 bytes
SHA-256: 45b9ce1014872b369476cc75d8a7b63b2e3ed395e28419daf66bd30eabd4401a

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