Malicious PDF — malware analysis report

Static analysis result for SHA-256 de3e9b02acba974e…

MALICIOUS

PDF

47.3 KB Created: 2021-06-04 04:18:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fa789e6bc0a7174d3266d714c4ef3ef1 SHA-1: d0d7e2c921f9c68bbcf2ec12bb435849dd5f94b2 SHA-256: de3e9b02acba974e82067b0b8248153e91e4b894ef151410d6cefb47c992613c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/coin-master-hack-spins-and-coins-unlimited-free-game-hack PDF link annotation
    • http://library.stieyapan.ac.id//repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-cool-free-tshirts_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/pokemon-go-free-app_GM1094591345.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-add-robux-to-usesed-roblox-card-cheat_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005332.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5332 24244 bytes
SHA-256: 4233384bfa85ac0633a1d436f8e29e9bfa500a64026a059e09adb795af31126e
font_01_sfnt_off00008b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B02 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000094ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94EC 18752 bytes
SHA-256: 9894c068b10d635aa02e8d25afb59d141e90fd875449b50e52c6a3fbfc43112a

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