Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e51ae0f259b3a9…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 22:00:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: fe36dc74f1fa5eabcc08a410c2158bda SHA-1: a05acb6176709155611879dc14509c29a978f350 SHA-256: f1e51ae0f259b3a93e3321472c3048141e75702e016a13c433edc7bb55c876a1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links designed to lure users into clicking on what appears to be free game hacks or generators. The primary link, http://netcdn.tw/app/479516143/is-minecraft-free-on-ps4-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious sites, likely for further exploitation or phishing. The ML classifier also flagged this PDF with high confidence.

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/479516143/is-minecraft-free-on-ps4-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/download-roblox-mod-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/is-tiktok-free_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-free-for-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-accounts-lost-pin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-keyloggers-v3rmillion_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-glitch-roblox-game_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-pc-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-hack-2021-december_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hacks-for-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-do-i-recover-my-childs-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-no-need-to-do-anything_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-app_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
font_00_sfnt_off00003310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3310 22620 bytes
SHA-256: cb7eeac04782f42393ead076da94638695b3b8382a8bd92714c2e63587e7990c
font_01_sfnt_off00006592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6592 18072 bytes
SHA-256: 7f567a84a7e198bcdc49c7aa6551e689257849d03792405e9cf70b2ffc94edbd

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