Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6265b0671efea06…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 06:11:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 96366cc856b57db2349637b26d45ad33 SHA-1: 3a71e68da70a76ddc05047722724048f063c84ee SHA-256: c6265b0671efea0614e59a1adfeb11c2f4932df6b7a84b0f4781fdede264a984
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 0.9980

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 http://netcdn.tw/app/406889139/get-free-spins-link-in-coin-master-game-hack PDF link annotation
    • https://perpus.upp.ac.id/digilib/repository/earn-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-hair-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-dick-hack_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-hide-and-seek-cheats_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-memes_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/worst-client_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/youtube-yammy-xox-roblox-hacking_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.upp.ac.id/digilib/repository/free-robux-survey_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_002_off00003033.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3033 22384 bytes
SHA-256: 722b3490be0a72247893a615410a1431b9d2879f397d7439a0b6fce4577ca7c3
font_01_sfnt_off000061a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A4 18344 bytes
SHA-256: 223694a411494bb40917187ba899f9bcbf7f70620dafdd5c166b4f4298ff1984

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