Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eaa833c7d5cce8c…

MALICIOUS

PDF

43.5 KB Created: 2021-06-04 02:32:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: dd5ac77c7d34082065e08d6829b1bb94 SHA-1: 77bbdda29e387aed7c32e0c68bdc8b3dac3e103f SHA-256: 5eaa833c7d5cce8c99b0026820600d3d90c62fca52746527c3b50396eda7f0a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector for game hacks. The document body and embedded links suggest a lure for free game currency or cheats, which is a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely leading to further compromise via the redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/how-can-i-get-free-coinsn-coin-master-game-hack In PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/robux-gratis_GM431946152.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/app-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/how-to-get-free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://perpustakaan-pelita.sdnpercobaan2yogyakarta.com/repository/websites-that-give-you-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_off00004ef4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EF4 25360 bytes
SHA-256: 95bad2760d68f0c79a85085698be5fc8533c93328d2269fc9b40e6e49d548453
font_01_sfnt_off000088c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C8 17872 bytes
SHA-256: 7acb2ea7ca48292ff84e38b925b00f57c40a05e644be1ec1a4eb48c7cb3542c1

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