Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0e144f02dc5113…

MALICIOUS

PDF

33.3 KB Created: 2021-06-20 02:47:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 17d631ebe5760d13e65f7adaf47412bc SHA-1: 142c58afa339df961c9f977aab8ef26570ee0310 SHA-256: aa0e144f02dc51132f9d76c827e821aace60d66c084c96e66f9ad1077616562e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators' to lure victims. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves tricking users into visiting these malicious URLs, likely to download further malware or lead them to phishing sites.

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.co/app/479516143/best-free-minecraft-servers-game-hack In PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/tiktok-free-100-likes_GM835599320.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/hack-tool-for-any-game-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-2-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/pubg-uc-midasbuy_GM1330123889.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-change-your-name-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-generator-no-human-verification_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
font_00_sfnt_off00002fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA8 21812 bytes
SHA-256: b6fd66bb90d29ac3e6bd498d8793d1687962b9f2aa12b04d7e9a9023de3351ac
font_01_sfnt_off00005fa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA3 18188 bytes
SHA-256: 690aa9f6e393aebb2e451ae7360f2334a153522b180a230b3d87e49d6c6f2140

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