Malicious PDF — malware analysis report

Static analysis result for SHA-256 def0f12cf02afa49…

MALICIOUS

PDF

45.6 KB Created: 2021-06-11 06:22:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 095648f82fa116266114308ff1f073dc SHA-1: f4eeb2064aaf1f703c9ff8d5f71af8bdc65d81f9 SHA-256: def0f12cf02afa49749a27e30239c888e9d2d5781f10c031ddcd8d40bd7c8fa4
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 0.9864

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 https://netcdn.tw/app/431946152/20-roblox-card-free-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-dragon-ball-rage-stats-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-cheat-codes-iphone_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pokemon-go-free-game-online_GM1094591345.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_off00004daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DAA 29680 bytes
SHA-256: dcfdc02baf5ae8e2c403b76e258d1e6a30a1d954b755822f5f7395df3b1b77a8
font_01_sfnt_off00008ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA7 18644 bytes
SHA-256: 87d1e24880ef251d1ac128f4dbe72e972d4612f399462d2a148cffd0ecaa318c

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