Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e378c71b127f3f…

MALICIOUS

PDF

34.7 KB Created: 2021-07-08 12:28:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0a54c4859aca20b1e95af9fb0439aabe SHA-1: 8f1e4dbf905982af93ad7ebf15f4d665c95a0a01 SHA-256: 09e378c71b127f3fc9d86b35ad883834bb81b74dcb807e8eafc0e7f5f25ff625
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/free-spins-coinmaster-game-hack. This redirector is likely used to deliver a second-stage payload or phish for user credentials. The document body and embedded URLs suggest a lure related to game hacks and free currency, a common social engineering tactic.

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/free-spins-coinmaster-game-hack In PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/roblox-free-roux_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/roblox-ninja-shirt-free_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/dragon-ball-rage-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/free-games-with-gamespasses-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/free-robuxs-no-offer-real_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/roblox-apocalypse-rising-hack-december-2021_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/8-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/roblox-prison-life-btools-hack_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/websites-that-get-you-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/roblox-redeem-cod-free_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/roblox-free-bc-2021_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/free-roblox-generator-just-enter-password_GM431946152.pdfIn PDF document text
    • https://e-learning-ma-nurussaadah.com/__statics/gudangsoal/files/coin-master-hack-to-get-free-spins_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_off0000313c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x313C 22884 bytes
SHA-256: 3a9e7fabb989d1d20b470819e6d7e373e69988197c19d187855075f8548f2639
font_01_sfnt_off00006494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6494 18432 bytes
SHA-256: 82bdd102b9bb03cf6f5fadaf1f6d4f135f15d3242454ad2f3b5f1fa21e8b8859

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