Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd8e16dd255c36a…

MALICIOUS

PDF

47.8 KB Created: 2021-05-14 08:02:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c7f5f58f62e1e1d357044647cf3423e2 SHA-1: 3394ba8d88ceb9289325c15eed4c29e494aacb1d SHA-256: cbd8e16dd255c36a031838ac198227b20051ba5512403bbadf48410219e7aa3e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'hacks' for games like Coin Master and Robux. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-free-spins-and-coins-daily-game-hack. The document body and embedded URLs suggest a social engineering lure to trick users into visiting these sites, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/coin-master-free-spins-and-coins-daily-game-hack In PDF document text
    • http://handimanlibrary.org/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://handimanlibrary.org/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://handimanlibrary.org/repository/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-online-hack-no-human-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_off00004c34.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C34 31940 bytes
SHA-256: 0a06a4f739463dc2328d75b0a3b15578297ae7f9e5c903d317b6509b6467284f
font_01_sfnt_off00008e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E23 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000097d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97D5 18480 bytes
SHA-256: e9052e0f9c593188345ba389179451ef12c6c6a401d56a628cce0964dfd3917c

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