Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd9a6d8c51afdae…

MALICIOUS

PDF

39.1 KB Created: 2021-05-21 19:14:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: aa350c91ef47669d99974aa7fedd3551 SHA-1: ea9f5713ff2903a6da0f741105f8d2449a20f3ce SHA-256: 6dd9a6d8c51afdaecbaba2aa7ba7fe925474845e7988a7e1bf2229192927ef50
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs and a prominent call-to-action to download a 'free generator / game hack'. The heuristics indicate this is a lure to trick users into downloading potentially malicious content. The ML classifier also flagged the PDF as malicious, supporting this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/479516143/free-bedrock-minecraft-game-hack PDF link annotation
    • http://xn--80aciiv6azczc.xn--p1ai/images/earn-rbx_GM431946152.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://xn--80aciiv6azczc.xn--p1ai/images/free-robux-legit_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_002_off0000341b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x341B 25332 bytes
SHA-256: 14855beafbfd9127653f49b2b59eb711befa33871cc2a72eada5b99620b85ad5
font_01_sfnt_off00006d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9F 2856 bytes
SHA-256: 8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44
font_02_sfnt_off00007776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7776 18268 bytes
SHA-256: 05ed720d8c36cfe0e57c7fbe1498521d5bd0f1bc1658fa5d78b5dc7504aada24

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