Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f1e1694273f64a…

MALICIOUS

PDF

37.4 KB Created: 2021-07-04 14:02:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b168173f5200c4b9538dffeece99cb74 SHA-1: 6e777b737abe1b5f9d069e3260465e681751f110 SHA-256: 62f1e1694273f64ac9df4b632e6ae99f5e4f7e136ba7c456b2a0897849cc4d5b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure for free in-game currency and hacks, directing users to a malicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics indicate a phishing attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/free-spins-for-coin-master-2021-game-hack PDF link annotation
    • http://www.salwangurgaon.com/files/roblox-how-to-get-free-robux-tips_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/run-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/roblox-old-guest-shirt-free_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/corn-master_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/tiktok-free-no-download_GM835599320.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/robux-hack-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
font_00_sfnt_off00003084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3084 22992 bytes
SHA-256: 6a1d410ab86d775d094957cdae0ced180017216ccaed74bdb33f6244d7e4c98f
font_01_sfnt_off0000643a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643A 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1F 18576 bytes
SHA-256: fb0fb59ed2c1a9034e606a4b9af272ef40c933264071e94cfd5fd7ab3c408864

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