Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e12b2476f3d0afa…

MALICIOUS

PDF

50.1 KB Created: 2021-06-11 07:31:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 38daa0594f6994ae2ce7a8a0a81d8b62 SHA-1: 257628b610a1f18787c1f9e1f3a80a295fc6c1a6 SHA-256: 7e12b2476f3d0afab544f8232d1cf3630299653134bcd63d21c30faddb190b2b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on a "free generator / game hack". The primary link, https://netcdn.tw/app/431946152/hack-peoples-robux-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt, likely leading to further malicious content or malware download. The presence of multiple related URLs reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

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 https://netcdn.tw/app/431946152/hack-peoples-robux-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/hacking-words-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/hack-roblox-games-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/install-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/freerubux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-how-to-get-free-admin-on-any-game_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/como-tener-robux-gratis-en-roblox-2021-enero-nuevo-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://rblx.landIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000540a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x540A 25260 bytes
SHA-256: 1f9f995995ce816e20e72fc79b3abdfa9f2425d36cd41a3eb056e4b3707955c1
font_01_sfnt_off00008e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3B 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_02_sfnt_off0000a01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA01D 18652 bytes
SHA-256: b76d577e0ad21b5d843e28e28da400d44bcac1250b442e5d82c38a6bc283787b

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