Malicious PDF — malware analysis report

Static analysis result for SHA-256 048f186b67d82a1a…

MALICIOUS

PDF

49.1 KB Created: 2021-06-11 01:05:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3ee018de39f9e747e29a3b3a816ec0fa SHA-1: e70b1999a611208cfd0b987286d33c6f4c6016b9 SHA-256: 048f186b67d82a1a7758d5eb980b0f659e74e72df01debc577d4faf1ebf46cc5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically targeting users interested in game hacks and cheat codes. The primary redirect URL is https://netcdn.tw/app/431946152/how-to-enter-roblox-cheat-codes-game-hack, which is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a workflow designed to lure users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/how-to-enter-roblox-cheat-codes-game-hack In PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-mml-admin-hack-script_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-robux-giver-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-software_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/cheat-codes-for-roblox-mad-city-cash_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/any-free-roblox-exploits-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://discordIn 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_off000050d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D6 27568 bytes
SHA-256: 0b51f3a960396dd0777b5926cfb7f415fa293656f72b2deeaf5d6bd3a3c074dd
font_01_sfnt_off00008f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9D 3608 bytes
SHA-256: 608f0dd4f6bfb6adbccec84228618ee8e4c9e09226d7330efb5300e499d1567f
font_02_sfnt_off00009c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C25 18620 bytes
SHA-256: 680a5be096407636f32f9307333c3613ba898d93c5b295c6fc73d57bdea47dd3

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