Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3681be0724fb836…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 02:44:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 893283f45438eb95eb454890ab80518f SHA-1: 15901014e26f58aaddb7521bdd875b074457512f SHA-256: c3681be0724fb83622ca1be2df1d60fb499ea049494f690de4746e6df3a7653a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generators' and 'game hacks' for popular games. The primary lure URL is http://netcdn.tw/app/479516143/apps-to-get-minecraft-for-free-game-hack. This indicates a social engineering tactic to trick users into visiting 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/apps-to-get-minecraft-for-free-game-hack In PDF document text
    • http://library.smpn2-byl.sch.id//repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/apple-hack-online-roblox_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/roblox-1x1x1x1-hack-crazy_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/how-to-make-your-game-in-roblox-hack-proof_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/how-to-use-inspect-element-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/pubg-uc-and-bc_GM1330123889.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-apk-35-11_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_off00003172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3172 22548 bytes
SHA-256: 18cc1b1de9dd53218d495fdceab85a8799d020c063cb6bd6a5025155aa3455a7
font_01_sfnt_off00006396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6396 18176 bytes
SHA-256: 74e080009ec24c2e27e640cadf86a174884a6cecfca268615f0286b834ab0ebe

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