Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b1dd98444a1ec1…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 13:19:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 065d57efaf0dd4e61fd8f0646128edbb SHA-1: abc7657a7c288fcb5da01dcf92e78a0fc8b3406d SHA-256: 74b1dd98444a1ec1d27b0c545fc900d62b54ace71f673a40a4f2ad8e9127ac86
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a malicious redirector link disguised as a "game hack" generator, which is further amplified by a fake CAPTCHA lure. This suggests the document is designed to trick users into clicking the link, likely leading to a malicious website or a second-stage download. No scripts were extracted, but the embedded URL and the fake CAPTCHA heuristic strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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.online/app/406889139/hack-de-coin-master-game-hack In PDF document text
    • https://pustaka.mic.sch.id//repository/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-com_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coun-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-com-r_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spins-link-download_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ef0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EF0 24620 bytes
SHA-256: 229cbffc7faec3c39a4f4fe3c13b170a66dac702a45a092c6a3be477b20374b6
font_01_sfnt_off00008765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8765 3124 bytes
SHA-256: a0e4a5f378f23ac829e40ef1a0638115ffab18b17acd7561ed9b637601232063
font_02_sfnt_off00009248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9248 17884 bytes
SHA-256: fe1f543f7e0d5456aa533f199736749e60ab2e23c1ee6e9e48397ebfc3747ba6

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