Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a602855a17100e…

MALICIOUS

PDF

34.8 KB Created: 2021-07-09 11:25:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2726b93ca61e79cfa14d2c18870c68b4 SHA-1: c119ca6468afc612bb2eaf8d1b67926a08cb6170 SHA-256: 95a602855a17100e6b8387f2b0bf9287f42df1b337f61679bec4b90237bc85ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to redirector infrastructure, specifically advertising 'game hacks' and generators. The primary link, http://netcdn.tw/app/406889139/coin-master-hack-activegamer-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a lure for users seeking in-game advantages, which is a common tactic for distributing malware.

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-hack-activegamer-game-hack In PDF document text
    • https://www.tiancom.com.tw/upload/files/hacks-for-roblox-for-acer-one-722_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/tiktok-free-10-followers_GM835599320.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/impact-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/tiktok-likes-free-trial_GM835599320.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/dax-she-cheated-roblox-id_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-username-and-password-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-a-free-krambit-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-coin-master-s_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/yummers-free-robux-obby_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-hack-download-no-virus_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-hacker-roblox-for-free-robux-2021_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_off0000314c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x314C 22996 bytes
SHA-256: bae0476449e2ea2ef7be6e42c160352c066e1775b7b01cd721f5026beb4930f9
font_01_sfnt_off00006505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6505 18376 bytes
SHA-256: 9071112516a3c1a751db78ff2cf185d6a5c8a1d73babf85370e027775254c109

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