Malicious PDF — malware analysis report

Static analysis result for SHA-256 a169ff5ad6b1f9e6…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 13:23:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 97cac32eb8b329f4501d3ce4692d00ea SHA-1: f6bbf84a4d7a355cd5ddb77ef1580819a1ee997e SHA-256: a169ff5ad6b1f9e65d9c56460c8f410ec0fbf89a34761931d9b5bf733e75ade0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-free-spins-link-june-2021-game-hack, which is flagged as malicious. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting malicious sites, likely for malware distribution or credential harvesting.

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/coin-master-free-spins-link-june-2021-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/pokemon-go-free-clothes_GM1094591345.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-segway-free_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/pubg-uc-and-skins-buy_GM1330123889.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-free-money-in-ultimate-driving-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/pokemon-go-free-ditto_GM1094591345.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-hack-mod-apk_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_off00003036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3036 22268 bytes
SHA-256: 97d3544d7589d8187ebc96cd01cb2eb545bcd7efaa4b1fb9cf3485e85159d1f8
font_01_sfnt_off000061b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B6 19052 bytes
SHA-256: da088671e108859af3dc13ad18939fcd6ad3c9e33d2991314a6b018d2c6434df

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