Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c685a83d14eb4c…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 17:34:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 64fc00b0fa6e8f0068b5eadc94f9d333 SHA-1: ebe8833b4c3ae9a5491c56dfa41a27646acf7586 SHA-256: 94c685a83d14eb4cfd43ec382f21fd10a232421647e2e12d420d1e3f0c24e160
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and in-game currency to entice users. It contains multiple links, including a critical one to a known malicious redirector at http://netcdn.tw/app/431946152/how-to-hack-roblox-accounts-for-robux-game-hack. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites. No scripts were extracted from this sample.

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/how-to-hack-roblox-accounts-for-robux-game-hack In PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/boosted-gamer-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-cheat-flying_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/krnl-download_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-robux-hack-2021-download-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/i-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-roblox-escape-room-cheats_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-any-verification_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_off000030e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E0 23096 bytes
SHA-256: b004f4f0634ed731a91642df95cc50c524c92fbbf3e9636ab2ecacd787228923
font_01_sfnt_off000064e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E2 19228 bytes
SHA-256: c30d944de0a6baf9276c4865844fcb990da37fa04730b451441052e57c665125

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