Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a4ad158b9b27c1…

MALICIOUS

PDF

34.2 KB Created: 2021-06-18 03:14:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 08cca46fdb83cdd299ed2b74bb0ce5e8 SHA-1: befee52f70a4f3200b636075d3768928ba5a1aaa SHA-256: 95a4ad158b9b27c1fc552b10596ef35c95c4c67950654a3e847c69800e9d108f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that are flagged as malicious redirectors, leading to sites that promise free game currency or hacks. The document body and embedded URLs suggest a lure for users seeking cheats or in-game items for games like Roblox and Coin Master. No scripts were extracted, but the primary malicious function appears to be directing users to potentially harmful websites.

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.co/app/431946152/roblox-toys-free-code-generator-game-hack In PDF document text
    • http://library.acehresearch.org/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-2021000-robux-for-free-only-one-click_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hack-my-roblox-account-freee-no-downloads_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-hack-in-roblox_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_off000030e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E9 21568 bytes
SHA-256: d52918ed90a3587c79a5195734cc3b8e60f142cb03642e876220c73e8f7bf762
font_01_sfnt_off00006049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6049 19108 bytes
SHA-256: 3911eb0f817bfeadef52a44de3d9ec7b87b1fd27ffc1952bc1a59c123637107a

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