Malicious PDF — malware analysis report

Static analysis result for SHA-256 e423b9b1e467b091…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 09:44:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 32034059d2a6bb4392fd36b27a7ffb70 SHA-1: c95c39dd928893f53eef074261f6d562976923e7 SHA-256: e423b9b1e467b09106f178505d44276b614dddd133ee6056a6ad83cbe5c2ccc3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to websites offering 'free generators' or 'hacks' for popular games, a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the embedded URLs and the nature of the lures strongly suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-real-free-spins-game-hack In PDF document text
    • http://katalog.ireyogya.org/repository/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/pokemon-go-free-raid-pass_GM1094591345.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-coins-link-2021_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004c4b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C4B 26288 bytes
SHA-256: 8628987e4ec542ca3ae9cf0c4e65ea422903fa23355092c8b0e912883f87fd1d
font_01_sfnt_off0000886d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x886D 17960 bytes
SHA-256: 614295126cde334420460b671e97520ef00bc17125d6db356981682f81072261

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