Malicious PDF — malware analysis report

Static analysis result for SHA-256 eefe5f1b623d0a9e…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 07:50:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9e7b4eea57e4a72b6723a936b49402fc SHA-1: 94f7a883f4b339e32cce77c5ec54feb48ac41519 SHA-256: eefe5f1b623d0a9e19a46176ceb9d9e4dbe74da51d6ad282365d1940788fa21d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a generator for free game currency. The heuristic firings indicate the PDF is designed as a lure for game hacks and redirects to malicious infrastructure. While no scripts were explicitly extracted, the nature of the PDF and its embedded URLs strongly suggests a social engineering attack aimed at tricking users into visiting potentially harmful sites.

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/431946152/google-how-do-you-get-free-robux-game-hack In PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/toolbox-mod_GM479516143.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/roblox-redeem_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/hacked-roblox-shirt-forums_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/roblox-set-hack-com_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/roblox-tracker_GM431946152.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_off000030c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C8 22496 bytes
SHA-256: 38140e5d2e92f902b809cfef53ccd3e8d728890f492e2b0cb23baefe6d7a8d8d
font_01_sfnt_off0000630a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630A 19388 bytes
SHA-256: e0d82c167f6ca64f121b23a1748ead6b70296300b19a9978e36a20c70c2cac67

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