Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1979c8c056c70f5…

MALICIOUS

PDF

48.8 KB Created: 2021-06-03 05:11:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 13df55daabc7a1e939e043c82d38c32e SHA-1: 2a47e2938c87fc6be08b199c33abcfbf3edcdd77 SHA-256: c1979c8c056c70f50c680cb995d55eb4cdd30cb318c08fcbed3e4748a0b84e30
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to websites offering game hacks and free in-game currency, a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the presence of these lures and the high ML score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/406889139/coin-master-free-spins-link-2021-blogger-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/install-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000526d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x526D 26748 bytes
SHA-256: 17f084aebe685315f3e8a0f2b91d8e63a7a2e292d0569128ad583a70c4d3a467
font_01_sfnt_off0000901d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x901D 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000099d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D0 19036 bytes
SHA-256: 6906a9989d8784d6f8a9776352e09c335330dbd77f725755b0e4967acb3193dc

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