Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc10081ed3aa2dbb…

MALICIOUS

PDF

35.9 KB Created: 2021-05-23 01:49:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c378305ee87de0ece81d03b610eac96d SHA-1: 6527169b7e1e073e86a214730f60360703f2032e SHA-256: dc10081ed3aa2dbb51c089c5b3f44276038afb4846f9ea5c36469b730c0dbc81
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a game hack lure, specifically targeting Coin Master. The document body and extracted URLs reinforce this, pointing to a URL designed to trick users into downloading potentially malicious files disguised as game cheats. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-free-stuff-game-hack PDF link annotation
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://www.ankitabrushes.com/uploaded_files/userfiles/files/free-coin-master-cards_GM406889139.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_002_off00003483.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3483 24508 bytes
SHA-256: c10d01a32f75aa704c9995a2ec4695c3882f16e1e9ca974fd05bb1639637ce83
font_01_sfnt_off00006c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C60 17848 bytes
SHA-256: 49970788d519349fbd5ba6badf06c324563f4794a9a5c1e41d0627a31815ac32

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