Malicious PDF — malware analysis report

Static analysis result for SHA-256 554f0ef552d85052…

MALICIOUS

PDF

40.1 KB Created: 2021-05-22 20:24:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: afbe2fc6411befc389c90901d6411d27 SHA-1: 6bd74f821f6edd9f6ff3dcadb82ab88b2c08bcc7 SHA-256: 554f0ef552d85052a5a9d55bb5448bb08206f9a9d7fec53d733cfe7d84c0731f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a high-confidence heuristic flagging a link to a 'free generator / game hack'. The document body also contains a call to action to access a 'Coin Master Generator'. This suggests a social engineering lure to redirect users to potentially malicious websites or downloads. No scripts were extracted, but the presence of embedded URLs and the lure itself points to a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8010

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-free-cards-game-hack PDF link annotation
    • http://fengshui-shop.com.ua/images/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://fengshui-shop.com.ua/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://fengshui-shop.com.ua/images/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fengshui-shop.com.ua/images/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://fengshui-shop.com.ua/images/facebook-coin-master-free-spins_GM406889139.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_002_off00003399.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3399 27700 bytes
SHA-256: d6bf8812d3cda1a292a3ce580b9d94e3adcb836801a8a9ce321b6701871166db
font_01_sfnt_off000072dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DD 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off00007c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C7D 17884 bytes
SHA-256: dce98ab1a9f6331dfaabbdd57dacdba92c66b57249d10e9c2a1df39138c2a47b

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