Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b98164e900e95af…

MALICIOUS

PDF

41.5 KB Created: 2021-05-14 08:28:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e9e90a487df5b33a2606270e4ef9cbf3 SHA-1: f825ba90ab939561e83eb14cb8416b211c34d837 SHA-256: 6b98164e900e95afd1464ab07d985f7aa23e80b319feaf4f47c73483bfee114f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a heuristic firing for a 'game hack' lure, directing users to URLs that promise free in-game items. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or to deliver further malware. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/406889139/coin-master-facebook-free-spins-game-hack PDF link annotation
    • http://unifieo.br/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/rbx-com_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-links-for-coin-master_GM406889139.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_003_off000045c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45C9 25672 bytes
SHA-256: 0d85835072885aa90b2129978debc682883b9275e099e44db099faa4a92966e2
font_01_sfnt_off00008002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8002 18212 bytes
SHA-256: 79ee12bc65f558d17d18def7b629625fa8f5f9a2516006f928dbcf1d2ff3cc16

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