Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a855da45a1dd3c…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 23:23:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7ff7d0f6eef97437155640f8bb9481be SHA-1: bb0f6cc400d0a77200322e3cdd21828e24a77fd6 SHA-256: 33a855da45a1dd3c74242474f68f8497b5b92dcfd522c5f41b9d66ccb5ea3656
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/how-to-hack-in-roblox-prison-life-game-hack PDF link annotation
    • https://digilib.darmajaya.ac.id/repository/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • https://digilib.darmajaya.ac.id/repository/free-robux-no-verify_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_off0000524a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x524A 28200 bytes
SHA-256: a4122a7d26fbd3034a290154e22d0d82d727fc094684d6165ab68393218e21ac
font_01_sfnt_off0000926c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x926C 18620 bytes
SHA-256: 06c4a0a22987171f64eaf6d898502a0ddf1128172b72fd679b67faae34548247

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