Malicious PDF — malware analysis report

Static analysis result for SHA-256 7504de51ffb5791a…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 20:07:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e50d4d80bb6ff83af2c9867ed52e4fc9 SHA-1: c257af4364a704178b6764a41c9e772bd2faadd7 SHA-256: 7504de51ffb5791a9f0ad704560fbac7af066a98251709feaab3bf06d8192c9d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on a redirector URL that promises free game hacks. This lure is designed to trick users into visiting malicious infrastructure, likely for further exploitation or malware delivery. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/406889139/daily-coin-master-free-spin-link-game-hack In PDF document text
    • https://opac.itp.ac.id/repository/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-jailbreak-fire-hack_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-lumber-tycoon-2-whitelist-hack-script_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-piano-hack-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robux-gift-card-number-free_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-troll-hacks_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-roblox-accounts-with-roblox-an-bc_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/i-got-cheated-on-roblox-what-can-i-do_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-sans-verification_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/da-hood-pitchfork-hack-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-black-panther-mask-free_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/boku-no-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robux-hack-tool-online_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-avatar-free-clothes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32A7 23748 bytes
SHA-256: ae968653ca409fb1651395f532f985bceed641aa35d8396486359448a8e96873
font_01_sfnt_off00006883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6883 18768 bytes
SHA-256: 6995f58a3344afdf1c39eea442142c3f86a5b05fd2aa483286546d573d63d37d

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