Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58e4f4a7656dcdf…

MALICIOUS

PDF

50.0 KB Created: 2021-05-16 11:12:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3a930094e7ae58860cae6886c8a8d27f SHA-1: d9e7deb0b7c8ad100673596c3c36c67ecb163e98 SHA-256: d58e4f4a7656dcdfe1857225f7dd7b49a104249d575fc5ff4603e127ab86f490
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that point to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The document body and extracted URLs suggest a theme of obtaining free in-game currency or items, a common social engineering tactic. The presence of multiple redirector links indicates a high likelihood of malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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.xyz/app/431946152/how-to-get-free-robux-without-offers-game-hack In PDF document text
    • http://dismarinamt.com.br/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://dismarinamt.com.br/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://dismarinamt.com.br/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://dismarinamt.com.br/images/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://dismarinamt.com.br/images/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://dismarinamt.com.br/images/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCF 25092 bytes
SHA-256: 4231e22b9978ba6ce26d6fb1ef5318357fcac020a610335a15e4f54afc224ef8
font_01_sfnt_off00008610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8610 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000092b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92B3 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off00009f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F5B 18768 bytes
SHA-256: 90722031df8f7e72138583497ea9de630fa8b2a13d2a01041543da505e8107b2

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