Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4afd2d9e72a72e5…

MALICIOUS

PDF

48.3 KB Created: 2021-05-16 05:01:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4f20685db10ce6febef01a8ac46f0d21 SHA-1: 885e5841ce5a51d6bd9b0d34df53985d4c7c2ec9 SHA-256: b4afd2d9e72a72e59caa4607a8c2a2c00442860556a3de924be4722c9e0dbcd1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/real-hack-for-coin-master-game-hack PDF link annotation
    • http://1a-vermietung.com/images/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://1a-vermietung.com/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://1a-vermietung.com/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
stream_003_off00004a31.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A31 24748 bytes
SHA-256: d350a29640cd3cce8a92adadff56f562c83db4bec7fc2d9423433e8837075af7
font_01_sfnt_off0000839b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x839B 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off0000913c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x913C 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off00009b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2C 17956 bytes
SHA-256: c3bff0caf4b3e4fab2d80157ad4f14f97eaac11d6adb17aae1b51a270053db42

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