Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d89e67b7cddc546…

MALICIOUS

PDF

46.3 KB Created: 2021-06-04 02:03:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 842bc51e448970e2835c17af24aa7b1c SHA-1: 6f086fd9158c9f7becad7789546e19a00ccb8f34 SHA-256: 7d89e67b7cddc546a4df3fd970ef216ffdb09ac282fee5a4bb6bde72e862d1c3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, disguised as a 'game hack' generator. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF's structure and embedded links strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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-daily-free-spins-link-today-2021-game-hack In PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e29.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E29 24308 bytes
SHA-256: 8bbf019c5aa3c8cd5637fc5ee99326422c22b0441a4939f2822a240c023e848c
font_01_sfnt_off000085ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85EC 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00008f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9F 19052 bytes
SHA-256: 51ec1fd699785aa8f843f12306ac352f9679003eb9b4544ea09afbac11be1d71

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