Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f5ea5b1e65d8db…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 04:47:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 27e783e3c7587b4d623e7761996f3fa6 SHA-1: ab795276aa404cb19062d77c65b65ea0cb99d7ad SHA-256: 23f5ea5b1e65d8dbe42a53a8bb8b91ae3518dfd3c2736691b779d5579bab6fe0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency or hacks, directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the presence of multiple embedded URLs associated with game cheats suggests a phishing or scam attempt. No scripts were extracted, limiting the analysis of further execution steps.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/bux-free-robux-game-hack PDF link annotation
    • http://digilib.stimata.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-pets-in-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-hack-roblox-to-get-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_off000052b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52B8 25532 bytes
SHA-256: e7604b9d31c9f6811764755fbe3b8bef20f879ecab8b10f7f4666691060f62a1
font_01_sfnt_off00008d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D51 18012 bytes
SHA-256: 48dadac1a540eb24f39d188e0eb07df2fd2c4cea4184d8a92cbd726ce4786484

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