Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed154c8f77016cd…

MALICIOUS

PDF

47.3 KB Created: 2021-05-11 20:47:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 570b8921bb6fc92d58abfa9398f02ee2 SHA-1: 575bc45c209cd40e082ec5549f95c4e9f8275ad6 SHA-256: 1ed154c8f77016cd2d494ba21e11af7bf1c8697a0264785f9759ab3e2dd0de9e
122 Risk Score

Malware Insights

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

The PDF document contains multiple links to external websites, including one identified as a 'game hack' lure. The presence of a fake CAPTCHA heuristic suggests an attempt to trick the user into performing an action that could lead to further compromise. While no scripts were explicitly extracted, the nature of the lures and the ML classification indicate a malicious intent to redirect users to potentially harmful content or initiate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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.
  • 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
  • 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-free-cards-2021-game-hack PDF link annotation
    • http://digilib.stimata.ac.id/repository/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-18_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master_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_003_off00004bb7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB7 27220 bytes
SHA-256: 635d70612827ee45e604e7a1b78ff10cd2c08951a73c8979e52f1fd70c59f4ad
font_01_sfnt_off000089ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AC 3592 bytes
SHA-256: 8205e3b29cb44f91c42e08b5d0bed81c74c8dcd273656a00c726b07d80f6778d
font_02_sfnt_off00009659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9659 18288 bytes
SHA-256: 1103c1a9052967993c67e1ec6a20b7963a45820bc749ae4085be8aaf66ba1d93

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