Malicious PDF — malware analysis report

Static analysis result for SHA-256 464b063f32f8917e…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 04:59:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aa06ab1b64078d98ce68e58810cff7ab SHA-1: 50e462bb0eb2bf6225800ec190212e3af697ec1f SHA-256: 464b063f32f8917e7ce13c0a2de8ef106c30f81963925924054bb546f584096f
142 Risk Score

Malware Insights

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

This PDF document employs a lure of free game currency and hacks to entice users to click on embedded links. The heuristic firings indicate a link farm structure, with numerous URLs pointing to sites offering generators or hacks for popular games like Roblox and Coin Master. The primary redirect URL, http://netcdn.tw/app/431946152/free-roblox-card-codes-game-hack, is likely a gateway to malicious content or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-roblox-card-codes-game-hack PDF link annotation
    • http://libsmpn1balongpo.sch.id/repository/how-to-get-free-money-on-roblox-tycoons_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-color-name-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/hack-roblox-for-robux-for-free_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/esp-hack-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-robux-no-scam-no-survey_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/hacks-in-horrifick-housing-roblox_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/hacks-for-roblox-strucid_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-money-cheats-that-work_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-daily-free-spins-hack_GM406889139.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_off000031a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A7 22172 bytes
SHA-256: 992e2653c565807bd3554a5d0db446ea7d1f0d664f69666c1fab5d40e43c0106
font_01_sfnt_off000062e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E2 18824 bytes
SHA-256: 5863a25f68c4dee89f1f332a8beb3d1800c88bf377be75211d7322c344e9e5bb

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