Malicious PDF — malware analysis report

Static analysis result for SHA-256 806bdd3145027232…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 19:10:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e4816d3f49f8b9b59e348a55071ee4c0 SHA-1: 22a1bdec9424bf93abcfab5e89a09da58b98d4e2 SHA-256: 806bdd3145027232fdbb96bb14c0da78f7d26c50de62f8ca5ab89c5f1fd93d82
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/coin-master-pet-food-free-game-hack PDF link annotation
    • http://library.unissula.ac.id/fe/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-do-you-hack-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-images-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/comment-avoir-des-pices-dans-roblox-avec-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-change-your-name-in-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/code-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/pubg-uc-via-easypaisa_GM1330123889.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/20210-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-free-to-play-game_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-code-card-free_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_off00002ee2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EE2 22688 bytes
SHA-256: 9682847361101f9488804ac36ad7e73bf83078188c02b801c4e166b463de53f8
font_01_sfnt_off000061ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61EC 18324 bytes
SHA-256: 7f898f087de0c63ea34c3b0a8cd26138396bb89e1104774aa80067c589943042

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