Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4348ece9577315…

MALICIOUS

PDF

41.1 KB Created: 2021-05-24 07:16:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6498230f6b7f432b7fdb34c2f42910d8 SHA-1: adf725197daa26af7d3402b9f1dfd4d8a4c9dfca SHA-256: 7b4348ece9577315fc84fd21c3af5e24e88183eb02dad8c69fc4b47f1030b68d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7462

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/431946152/how-to-hack-a-roblox-account-2021-game-hack PDF link annotation
    • http://unionmusicaldebenidorm.com/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://unionmusicaldebenidorm.com/images/free-mods-for-minecraft-pe_GM479516143.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_off000033c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33C9 28156 bytes
SHA-256: dc41c6578c37ecee8f91e138e2eab0500d01d084bc636f5880d4b7aa4aa23e89
font_01_sfnt_off0000730f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x730F 2872 bytes
SHA-256: 5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207
font_02_sfnt_off00007ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCB 18992 bytes
SHA-256: aeef6a7714c6357f73dd4bac3524810632f54ab1d1528492d13c90d39421ba58

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