Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbd4a5176d03086…

MALICIOUS

PDF

43.9 KB Created: 2021-05-12 16:09:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: afe8a7e418b5b9a740348dd1f6ca7c82 SHA-1: d2efa87b9ca6ed337e79691686810037218d0d57 SHA-256: afbd4a5176d03086e607cff7d3df85571f73b3c284f4235998ccea2118c213fd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'free generators' and 'game hacks' for popular games. The primary lure URL is https://netcdn.xyz/app/406889139/instant-free-spins-coin-master-game-hack, which likely leads to a download or further redirection. The document body and embedded links suggest a social engineering tactic to trick users into downloading potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/instant-free-spins-coin-master-game-hack In PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-coin-master-spins-blog_GM406889139.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_off00004a0a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0A 28076 bytes
SHA-256: 71121f8239d78cf2dbd383e905fe2c9fcbc5d46c5d67e4bb8e4c1cb57611b9e8
font_01_sfnt_off00008ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACE 17884 bytes
SHA-256: 548329156333db4fa61a63bcdda2f5f8d49c53e924025ea46218be7e94f839d9

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