Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc60d2dd592a9935…

MALICIOUS

PDF

43.0 KB Created: 2021-06-03 12:29:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7f2a80b889a71ba8487e671b2a4d2594 SHA-1: 0e5d8781621312c45b9bf3458bb1f6247cefc2c1 SHA-256: dc60d2dd592a993585288900f9e9d9deeea9db15c2f1b28ce14203ee9a933c04
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, disguised as generators for popular games. The document body and embedded URLs strongly suggest a phishing or scam attempt to redirect users to potentially malicious sites. No scripts were extracted, but the presence of multiple malicious links indicates a high likelihood of user compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/free-online-generator-for-coin-master-game-hack In PDF document text
    • http://library.acehresearch.org/repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/flame-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/give-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_004_off0000512f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x512F 23664 bytes
SHA-256: 925af897356c40d2e3b80eae52d242ccf1886cdb7dd56f67fdf987c54959dbd7
font_01_sfnt_off000086ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FF 17784 bytes
SHA-256: 579eb47dde417d62ca8d8cd139302366ea0c7f7e900a00e7dd67578edc48d912

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