Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b4abdc0e7e29d9…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 06:08:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 150af265a11dd5600f82cd149d44ad1d SHA-1: 82d874cb0ee308470586325e4452b2c3d38bc940 SHA-256: d4b4abdc0e7e29d96eafc7d2023c3dedaddfcdf27864309c849288bb86bcd155
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering "free generators" or "hacks" for popular games, such as Minecraft and Coin Master. These links are identified as malicious redirectors, indicating a phishing or scam attempt. The document body, though partially corrupted, contains references to these lures and embedded URLs, suggesting the primary goal is to direct users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/479516143/minecraft-hacked-client-download-game-hack In PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/robux-link_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/tiktok-free-trial-likes_GM835599320.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In 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_004_off00004e70.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E70 24772 bytes
SHA-256: 5ebb418863c21ba8f9690df9a56b811033d6509d445596108ee4c8aec30edb35
font_01_sfnt_off00008756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8756 18460 bytes
SHA-256: e3089071acaa3d725dff62b6cfe00465db2477317d389ff23f6444401690c9a2

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