Malicious PDF — malware analysis report

Static analysis result for SHA-256 b986c172ac1e4aa5…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 17:16:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0d46a1a6f57dcfcf979ece5666b8f92f SHA-1: dbb375cd45dcec1ccdf41745314482f896915b33 SHA-256: b986c172ac1e4aa5bc884738dc03b3303ca96504e283f3cce530fb317f951a6c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/robux-com-free-game-hack PDF link annotation
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/pubg-uc-carding-method-2021_GM1330123889.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/www-rubux_GM431946152.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/master-coins-free_GM406889139.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://ruangpintar.man1gresik.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification-2021_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_off00003228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3228 21876 bytes
SHA-256: 2eb6b6aa641632d72d3d98a281a73db0b851d8e3d5b7f1b5ea13ff64fcd2acc2
font_01_sfnt_off0000628e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628E 18976 bytes
SHA-256: 27896acad5ca474033774e3721745fbaf6546dbb33b60a4a93bb974a81ff43ff

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