Malicious PDF — malware analysis report

Static analysis result for SHA-256 c185b94ddeea6237…

MALICIOUS

PDF

46.6 KB Created: 2021-05-14 00:32:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b98ae6e17c9700ba873fd1e1eb6f9338 SHA-1: 27596a4b971c646793927cbcaa7fd1bbb5db26db SHA-256: c185b94ddeea6237edee2b2649fcd353492b313fd01c8a749f8a2e2a26f25bff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "game hacks" and "free robux" to entice users. The primary redirect URL is https://netcdn.xyz/app/406889139/game-coin-master-hack-game-hack, which is also present in the document body. This indicates a social engineering lure designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/game-coin-master-hack-game-hack In PDF document text
    • https://infocorrosion.com/images/fake-robux-codes_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • https://infocorrosion.com/images/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/coin-master-codes_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/coin-master-free-spins-generator-no-verification_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_off00004936.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4936 24300 bytes
SHA-256: 150e026c94e5b86d22d24410042f9010ee48ed770048b1be330893c0f80e3c97
font_01_sfnt_off00008042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8042 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off000094cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94CD 17976 bytes
SHA-256: 206c578388b9bac3d1752862f80fd049ac7eba4f7fbaab7734ea75c2cf25eb07

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