Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c87556808ea4958…

MALICIOUS

PDF

32.1 KB Created: 2021-07-05 11:44:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2d0406161d4d57a0cb5866ac435f1575 SHA-1: 126dbaa5dc302bf7e2132635371d2d52cbdde78f SHA-256: 0c87556808ea4958bf334c2238d4f176428b2d4092a8d001237913de211a5b65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with game hack content. The document body explicitly contains the URL http://netcdn.tw/app/479516143/wurst-mc-game-hack, which is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to potentially harmful websites, likely for further malware delivery or phishing.

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/479516143/wurst-mc-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-free-robux-download-no-survey_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-minecraft-account-list_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
font_00_sfnt_off00002cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CCE 21408 bytes
SHA-256: aeac426b280a60ddcac75c723660ab0dc95c445c341af589dbf95bd9b9b80f31
font_01_sfnt_off00005b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B61 18072 bytes
SHA-256: f2e49008d51297eeb1fc8be2ba2f15def21feb23153b94f58eb81aee8282afc5

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