Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e22fac0275ca83f…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 11:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7b0fb24a74faa72c50a56cc408396f87 SHA-1: 5f3218a100093b70050ca983401dd07178761bf5 SHA-256: 4e22fac0275ca83f61257a73984adaa15f326f6198f04f8b29d5c48c4bccc36b
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them by promising free game currency or hacks. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document body and embedded links strongly suggest a phishing or scam campaign aimed at users interested in mobile games.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-free-spins-link-2021-app-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-hack-scripts-pastebin_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_004_off000054d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54D9 24716 bytes
SHA-256: 3fd3919430685e8c3e875aaccbcf2bff4f4b4f5e9bda53e941e70b6d1991601f
font_01_sfnt_off00008ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE3 18456 bytes
SHA-256: 167b39d3647e498e0ec03b327af8990ef16421e892c116ed7416f41c48696d06

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