Malicious PDF — malware analysis report

Static analysis result for SHA-256 079a4eff4b05204c…

MALICIOUS

PDF

45.6 KB Created: 2021-05-11 02:35:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a2bbc227355b1ae092000b275b1ae14d SHA-1: 4c0e0d30edaed1b94d0f2d5fa52a6bd52fc5acd5 SHA-256: 079a4eff4b05204cff76d6f6284a312fa406446a4d5efa07c48e893c3b5bd4d7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free Robux and game hacks to entice users. It contains multiple embedded links, including one pointing to a known malicious redirector infrastructure at `https://netcdn.xyz/app/431946152/free-robux-kid-friendly-no-human-verification-game-hack`. The document's structure and embedded links suggest it is designed to lead users to potentially malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/431946152/free-robux-kid-friendly-no-human-verification-game-hack In PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://elib-sd.msj.mis.sch.id/library/repository/coin-master-support_GM406889139.pdfIn 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_003_off0000438d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x438D 25816 bytes
SHA-256: fb4d20f75d439277bd66725581ef0973022fdb889960bb40c9a0c5c1debe225a
font_01_sfnt_off00007f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9E 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00008cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB0 19288 bytes
SHA-256: ea469787df873758e357019bb53a1e3c4242eb718badaf8706c42bdc2f61c813

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