Malicious PDF — malware analysis report

Static analysis result for SHA-256 1781de4902388d42…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 10:12:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 00404460a55395bf81bb1758d0bdf7f6 SHA-1: 3447e988db07dcd03f391e42962c2cda831f186b SHA-256: 1781de4902388d42f26014a9ddb1e518fca496df13bd57f2c6df01986ffcdb91
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious redirector. The document body and embedded URLs reinforce this, indicating a social engineering attempt to trick users into visiting malicious sites. No scripts were extracted, but the primary attack vector appears to be a malicious link within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-heaven-daily-free-spins-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-car-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/robux-offers_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/super-nice-mml-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/who-to-hack-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/parkour-roblox-hack_GM431946152.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_off00003028.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3028 22600 bytes
SHA-256: bb837aa92b8d1665c1545f2bbff5604d2f2a2ca863e56df6a4cd528d754a51df
font_01_sfnt_off00006272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6272 18712 bytes
SHA-256: c5a2e379eb30f3ba6d11c11e3bc267f737f614ea6eb6943f62597589edb773c5

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