Malicious PDF — malware analysis report

Static analysis result for SHA-256 1287bc721cb9f844…

MALICIOUS

PDF

43.9 KB Created: 2021-06-13 21:44:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f817fa54d465c76296b56d50c1084bbe SHA-1: 108bb4f9209d0b21bd30f164033c6dfcfcd8a7af SHA-256: 1287bc721cb9f844592c4d69dc13f42318337264ba09dfd4cb8961b3bdb70064
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to a "free generator / game hack" website, a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure itself contains embedded URIs that likely lead to malicious content or further download stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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 http://netcdn.co/app/479516143/get-minecraft-for-free-game-hack PDF link annotation
    • http://apartmani-mestrovic-krk.hr/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/mcpe-hacks_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/pokemon-go-free-1km-buddy_GM1094591345.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/mcpe-com_GM479516143.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-roblox-accounts-dantdm-com_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/roblox-speed-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004756.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4756 25660 bytes
SHA-256: 40a7f030fdfa3a5ef72b0bae8a05ac1694f9155c20fbd8028c9c69b6984c5d4c
font_01_sfnt_off000080a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A3 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00008a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8C 17712 bytes
SHA-256: 35f99bfb73b52248bbdf58e6e807942ea3200a6c0759a8418b864f3a1fae0a50

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