Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d50fcacdc173bdf…

MALICIOUS

PDF

42.4 KB Created: 2021-05-13 23:32:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 067e3f203a3abf39d1e622febcf9a676 SHA-1: e4623dcbfd130b36ef5322210d3e688477f835bd SHA-256: 8d50fcacdc173bdf7ca612987e94d7350a25e77271b9b16eecca00067a6a7674
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 0.9971

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.xyz/app/479516143/minecraft-ps4-free-game-hack PDF link annotation
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://e-learning.mtsn6kediri.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.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
stream_003_off00004c70.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C70 25120 bytes
SHA-256: 7c2c87c3750311579ae500f0b509429be0d28482ae70b15afbf13533d5bdcef5
font_01_sfnt_off00008519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8519 17784 bytes
SHA-256: eb08404513e1de89cb797b3c4bca4c8ebf2d802e230ebef8911427dd20e63131

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