Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf580b07e34a0cbd…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 06:05:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3608894c1e2dcc48aabcb09b3497be84 SHA-1: b6e97f51e420b41353eaade32da17b447277f5ef SHA-256: bf580b07e34a0cbd265d2919e99d2f811c1953ce5b8b54354a894b1a4854e93d
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 0.9832

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.online/app/431946152/how-to-get-free-robux-without-doing-anything-2021-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-tiktok-likes-75_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-tiktok-followers-just-username_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-gang_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_off00005035.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5035 28436 bytes
SHA-256: f0475a5404ab1006a10625ecca09c169f8d2f786474fb8388eb9397397d9cc35
font_01_sfnt_off00008f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6F 19804 bytes
SHA-256: 7de61e10f8b36a8651a25a8843179e8b1ecc4bebcf46d2f81f98618caa29dc1a

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