Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fc1255ff1bc692…

MALICIOUS

PDF

37.0 KB Created: 2021-07-01 08:25:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cd9af52f7232121e2e7a85c5bc8e0910 SHA-1: 7b7be8d5c3028bb14d555538fba562ae3966268d SHA-256: 95fc1255ff1bc69253e3e96f4d48f80ed34a97d38ed863df1984d910987c5b48
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, disguised as game hacks and generators. The primary lure URL is http://netcdn.co/app/431946152/can-you-get-roblox-on-nintendo-switch-for-free-game-hack. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/can-you-get-roblox-on-nintendo-switch-for-free-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-hack-tix-and-robux-generator_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-a-free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/earn-robux-gg-earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-boga-boga-infinite-mojo-hack_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-link_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-games-set-up-for-roblox-studio_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-cheat-engine-64-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/tiktok-free-views-hack_GM835599320.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/withdraw-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-free-robux-codes_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_off00003611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3611 23024 bytes
SHA-256: ac7e295a4ce2d2170f1999ec0430b7c5b8a01f944777e4bc39901da302d7a264
font_01_sfnt_off000069fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FA 19680 bytes
SHA-256: e8ddf2d87c3f11e91302bf25955ca9ab608dc4b7a83213cfcc683555c687b74f

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