Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df815a75b7878a9…

MALICIOUS

PDF

46.0 KB Created: 2021-05-12 12:34:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 737cb56146e5664962aaf7d7bb1a32e8 SHA-1: 1b7e1d8e9f6bbe49e974b6842078685e69f72094 SHA-256: 2df815a75b7878a90f93fd473e93902e6b297266d98ff2304ee0e6b4672e3a69
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for linking to a 'free generator / game hack' redirector, specifically targeting popular games like Coin Master. The document body, though partially garbled, contains references to game hacks and the primary malicious URL. The ML classifier also strongly indicated maliciousness. The embedded links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-game-hack PDF link annotation
    • http://oca.undil.tl/repository/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/robux-codes_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000487f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487F 26436 bytes
SHA-256: cbde1440a7bd4f4b25cb252ea152f2487fec734664fd5facc6d65bf56770442a
font_01_sfnt_off00008531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8531 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED2 19040 bytes
SHA-256: 126545496c1574546cbf955dc112d962cbfe23661e1a70d61a77987ae16b4ff1

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