Malicious PDF — malware analysis report

Static analysis result for SHA-256 b682913c02fd23fe…

MALICIOUS

PDF

34.8 KB Created: 2021-06-26 03:46:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 90ec479656c5cb18fefcc1f155154e53 SHA-1: 846a7714e2d1cf5736368a9cabd4bbc4ce2ab9b8 SHA-256: b682913c02fd23fee13117c985b4ddd8818c94786930192d198cb577fd1969e5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and generators. The document body and heuristics indicate a lure to download or visit a site that likely hosts a secondary payload or phishing content. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/impact-hack-roblox-help-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/united-nations-free-siterobloxcomgames_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/a-hack-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/counter-blox-roblox-offensive-hack-skins_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-dec-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coins-coin-master-blog_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_off000030b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B7 22400 bytes
SHA-256: ed430598e91c80d82e95a03d037549eabe4ef860ef1a65f4402e3dcabe169277
font_01_sfnt_off00006249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6249 19196 bytes
SHA-256: d2b1be08ee60dbe95c81e8b019fa80911a40d805e8c3542953fb932b912c8cf7

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