Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7834fa8d559232…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 08:31:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6686b31386d28cdd4ba741e2c1b5717b SHA-1: 03aa5684b671747f3f01bf431c31561d1aced92e SHA-256: da7834fa8d559232f6c0bb002fafaeacdc9716ab1ad258aa8fe2a3da79861029
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and free generators, directing users to a malicious redirector URL. The redirector, in turn, serves further malicious PDF files, indicating a multi-stage download and execution chain. The primary heuristic firings strongly suggest this is a malicious redirector designed to host and distribute further malware or phishing content.

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-unlimited-coins-hack-apk-download-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-a-group-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/pink-paradigm-hack-created-by-lord-of-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-free-robux-pins_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/cheat-roblox-jailbreak-2021-tp-unpatched-may-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hack-tool-for-roblox-pc_GM431946152.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/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-clipart-free_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_002_off00003063.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3063 23140 bytes
SHA-256: 38ae0b9d9f8135cde39098b55dc39cb88472841a97a1c1453cc2b494f75b836b
font_01_sfnt_off000064c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C4 19208 bytes
SHA-256: ac8a1cc94d9adebce7336fc1630e3f53360c4b0eb9ab9d36c6a158ed54cc7f68

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