Malicious PDF — malware analysis report

Static analysis result for SHA-256 e277dd1f081506d2…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 13:24:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 062188661d74d7a154453d6c0c789ba1 SHA-1: df3cc04d46a9cac90bd8540ed77052f972859979 SHA-256: e277dd1f081506d254df45079b825184e86f3cdeaab53d5b36e5891e6a6bb4a5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the nature of the lures suggest a phishing or scam attempt designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/406889139/coin-master-hack-app-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/when-pubg-uc-available_GM1330123889.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/can-you-get-free-robux-without-builders-club_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/114-hacks_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
stream_004_off000053cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53CF 26756 bytes
SHA-256: e0010d6739889a1a33f0d886529fba2fecf3692eabba3de7a8df79825cc19b83
font_01_sfnt_off0000907a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x907A 17892 bytes
SHA-256: f939fda97690d6a809d743b342add8ec97984f5e978608423f32dd39679c4d64

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