Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12151d9756b19cc…

MALICIOUS

PDF

34.6 KB Created: 2021-07-08 20:17:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d1c3d7c72397b4b9700afd29e09997f1 SHA-1: 3c1a309484baea4339c8e4f69fb2041a9ddeee72 SHA-256: e12151d9756b19ccb8af3fbedb4f74a5990a2e73ab6b824ca0ed52ab86a4cb26
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free script executor' for Roblox. The ML classifier and specific PDF heuristics strongly indicate malicious intent. The document body and extracted URLs suggest a lure for game-related cheats or generators, likely leading to further malware download or phishing.

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/431946152/free-script-executor-roblox-game-hack In PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/6lack-free-roblox-id_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/cool-free-roblox-skins_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/real-robux-codes_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://man1tuban.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_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_off00002fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB7 22492 bytes
SHA-256: 1efa6623239a22206f51c7ae16e279c75c4d934ee482363657239fce5c11728e
font_01_sfnt_off000061df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DF 19192 bytes
SHA-256: 5ec67ff0a1d76549777ff7b00fb55ee5a5dc35183321f73836e9d98427fb59d3

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