Malicious PDF — malware analysis report

Static analysis result for SHA-256 130c5613097ac8e0…

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 03:05:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e27dc13199106b5b46dc1bad2e24acca SHA-1: d42d2b551b7a8a279cbd857f6885bbe54ebcbfe4 SHA-256: 130c5613097ac8e074d504de094899f2aead39de632e28988aa57561556860a9
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, disguised as "free generator" or "game hack" lures. The presence of a fake CAPTCHA heuristic further suggests an attempt to trick the user into interacting with malicious content. The document body and extracted URLs indicate a focus on popular online games, a common theme for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/406889139/coin-master-free-coins-link-facebook-game-hack In PDF document text
    • http://gieldapracy.pl/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://gieldapracy.pl/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://gieldapracy.pl/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://gieldapracy.pl/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://gieldapracy.pl/images/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://gieldapracy.pl/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://gieldapracy.pl/images/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/game-toolbox_GM479516143.pdfIn PDF document text
    • http://gieldapracy.pl/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://gieldapracy.pl/images/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://gieldapracy.pl/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://gieldapracy.pl/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://gieldapracy.pl/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://gieldapracy.pl/images/roblox-free-items-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_off00004b96.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B96 25508 bytes
SHA-256: 92b697a6576102094429e5193c7974e4cb58e306d9d81161242a626d716fcd66
font_01_sfnt_off00008565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8565 18040 bytes
SHA-256: 63f6a73c8fcac7a0296ba30c45c7d116406f1db46acc5b5307ffbf1c764f0ccd

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