Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72955a02126c555…

MALICIOUS

PDF

49.5 KB Created: 2021-05-14 03:37:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a52c80df1196361e16f7234ea9b810d3 SHA-1: 51595a8b406697040fd55d3a6b48c4ff60f207ef SHA-256: f72955a02126c5552a98eedefca65a734697be72e2edb2ef5f19656f3057e3aa
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 0.8642

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/coin-master-50-spin-link-game-hack PDF link annotation
    • http://maxvanberchem.org/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/roblox-scam_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://maxvanberchem.org/images/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-roblox-intros_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_off0000491d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491D 24348 bytes
SHA-256: 56d8dba9c1684f7bc6b3f3aa57b2e4982156d9092c72f04551ec9c34b5db2e65
font_01_sfnt_off000080c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C6 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A73 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_03_sfnt_off00009efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EFD 18196 bytes
SHA-256: 1133898f442132de6b3babc63911783103e8ae6e1bd19e5d3637905fb0848ccb

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