Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ba747f28f7ab4c…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 14:55:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dfccf6f5a2c728754676bdf5b2cee1dd SHA-1: 86148721128849aff88eb684fb09e7849b9da78d SHA-256: 79ba747f28f7ab4cca693a75c0c3dffb8dc4f155be6e8c52b8e97d0dab88d985
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to a known malicious redirector infrastructure, specifically advertising game hacks and generators. The document body and embedded URLs reinforce this lure, directing users to potentially harmful websites. While no scripts were extracted, the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of a phishing or scam attempt.

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/406889139/coin-master-free-cards-link-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-everything-in-roblox-catalog-for-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/comment-hack-roblox-unboxing-simulator_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-cheat-engine_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-hack-no-human-verification-2021-pc_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/robux-free-no-survey-real-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-just-enter-your-username_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-hack_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
stream_002_off00003331.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3331 23272 bytes
SHA-256: 48f4e0261d18244d5bd3e5ae760b067251d7795e9e3aa98a095efb9dcbc3f05d
font_01_sfnt_off000067b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B6 18340 bytes
SHA-256: b8fa6a9dfd7b898beef7efa7d7509ded23f04ca787285e81f7d871fc825f65d4

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