Malicious PDF — malware analysis report

Static analysis result for SHA-256 354d4e6c1067156c…

MALICIOUS

PDF

36.4 KB Created: 2021-07-07 01:38:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3d6d69161be82a4415fdb632d91fed91 SHA-1: ca8b766e9e1c69189a251ba76a8a6aca758f3076 SHA-256: 354d4e6c1067156cf25ce01057262d5fd586bec95613b6b1e6f10d0e4584416f
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, employing tactics to attract users interested in game hacks and free in-game currency. It contains numerous links, including a primary malicious redirector at http://netcdn.tw/app/406889139/free-spins-coin-master-unlimited-game-hack, which is flagged as malicious infrastructure. The document body and embedded links suggest a phishing or scamming attempt, likely to lead users to further malicious sites or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/free-spins-coin-master-unlimited-game-hack In PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-dance-your-blox-off-hack_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/cheat-engine-roblox-kicked-bt-server_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-redeem_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://ibelive.com.tw/image/data/files/link-coin-master_GM406889139.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_off000035ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35AE 23188 bytes
SHA-256: e9d5f31a48e1fd2bd8a83eab4073febafc76de54cea83afa31971656c463a9ac
font_01_sfnt_off000069ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EE 18868 bytes
SHA-256: 2ae514214ba8136a29dde69fcf4364d8dbb9380ba0bdd85285d9bbc1786d9168

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