Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2834a3948d54dc…

MALICIOUS

PDF

42.6 KB Created: 2021-05-14 00:08:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6b2a0f6cf2c038edc2c179c05252205f SHA-1: e86efb3bfd12933d83d6b528519a20e9bebc7d9d SHA-256: 6b2834a3948d54dc5095e2e90a051fcc3764b48b876c19d658391b09161f17ba
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 0.9971

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.xyz/app/479516143/minecraft-anarchy-server-no-hacks-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.freenom.comHeyIn 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_003_off00004b75.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B75 24860 bytes
SHA-256: 4b16e393192599e45cc8c221bfdae14fd43d7ef17e08843399379be0eaa0cfe3
font_01_sfnt_off00008418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8418 18340 bytes
SHA-256: 25c1286fde013f5a892faec283bed83878941bbea70c27f39483b80af7cfb438

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