Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad024ddafcf05d5…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 03:38:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9a604b215d57cf6fa4bb26bc9a2f8efe SHA-1: bb1eeb9160d6b514fa9ad17d0a6773151b8cab50 SHA-256: 8ad024ddafcf05d5bcef7c60eeb997651970da3796c8306f3356b2607f47eae1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs that lead to a known malicious redirector, specifically http://netcdn.tw/app/406889139/free-spins-coinmaster-game-hack. The document body and heuristics indicate a lure for game hacks or free currency, a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the embedded URLs and the lure suggest a potential for JavaScript execution or further payload delivery.

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/406889139/free-spins-coinmaster-game-hack In PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/cheat-admin-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/roblox-hack-999999-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/break-free-roblox-music-video_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-free-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/hack-boku-no-hero-academia-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy-step-by-step_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/roblox-free-pets_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-free-chothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-account_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/roblox-vehicle-simulator-cheat-engine_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-roblox-app_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-realms-for-free_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_002_off00002fe4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FE4 22864 bytes
SHA-256: 74b9c143b756d238188bd961cc79328b5bf52e4da5265970f1143e880abf838c
font_01_sfnt_off0000634e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634E 18432 bytes
SHA-256: 82bdd102b9bb03cf6f5fadaf1f6d4f135f15d3242454ad2f3b5f1fa21e8b8859

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