Malicious PDF — malware analysis report

Static analysis result for SHA-256 e452cadf8a90a86d…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 09:43:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 56a4a8e505e5e89084d07be6e8e5a0fd SHA-1: 51b4b1892b272f99c0556daa30920062a540a903 SHA-256: e452cadf8a90a86d44dcd344142dcb99c1e70580015dd91e4c7a6f6049f25b1c
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 0.9832

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/what-is-robux-game-hack PDF link annotation
    • http://digilib.stimlog.ac.id/repository/i-want-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/robux-money_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-dollhouse-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-2021_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_004_off0000501d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x501D 29468 bytes
SHA-256: a6e3d3768abac54eb779f1ab2157cc3a720afbf2f82a32262bff817f037fa888
font_01_sfnt_off0000925a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x925A 18548 bytes
SHA-256: 7070353b21eed70d051fcccfd09e1ae143a04993e1be198983edadc0f9da1851

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