Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1fe16da4ab2c80…

MALICIOUS

PDF

41.7 KB Created: 2021-05-15 08:02:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 969e38f39912bce5cea3275b806050c9 SHA-1: 4f54234cdffbc9c1c3f6074a326731524c4a1b64 SHA-256: aa1fe16da4ab2c807eb81fbf7669cc1c6cb70c270825c18cac4d06cd094b6b56
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, specifically promoting 'free generator' or 'game hack' lures for popular mobile games. The primary redirector identified is https://netcdn.xyz/app/406889139/how-to-get-free-spins-and-coins-on-coin-master-game-hack. The document's structure and embedded links strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites. No scripts were extracted, but the PDF's nature points to social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-get-free-spins-and-coins-on-coin-master-game-hack In PDF document text
    • http://domaizdereva24.ru/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://domaizdereva24.ru/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://domaizdereva24.ru/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://domaizdereva24.ru/images/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://domaizdereva24.ru/images/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://domaizdereva24.ru/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://domaizdereva24.ru/images/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://domaizdereva24.ru/images/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://domaizdereva24.ru/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/free-roblox_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://domaizdereva24.ru/images/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://domaizdereva24.ru/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/roblox-source_GM431946152.pdfIn PDF document text
    • http://domaizdereva24.ru/images/roblox-free-robux_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_003_off0000493f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x493F 24316 bytes
SHA-256: 9f8e91de1da8509a40df501e4c92103bf90ab1504d5adff53bc81c37a546cae2
font_01_sfnt_off000080c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C7 18224 bytes
SHA-256: c3eeb8e5bbecb0a66d0dccf890560b2772aaf25cfcf2943a976e8e45774626aa

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