Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac178504161bb24a…

MALICIOUS

PDF

47.2 KB Created: 2021-05-10 15:15:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3b01eb918937021a499b37dded822180 SHA-1: a4406074c13a5937e417545b51f4dcc7ca606560 SHA-256: ac178504161bb24a0b0f4833bb1f2331aadd419cc7ef055dfde172dcbf8f6633
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 0.9750

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/play-roblox-free-online-game-hack PDF link annotation
    • http://fmbompastor.com.br/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/https-rbx-place-rewards_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_003_off00003e44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3E44 25936 bytes
SHA-256: b4a94137f4681a09b610c65e2335c55a2a645f2571be8e1cb191c25bfd388fd4
font_01_sfnt_off00007a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A51 8584 bytes
SHA-256: 9b14e8ba3f869a5fc8e48435cda109b56fd7c26053627e8b260995133c2c1b78
font_02_sfnt_off000095d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95D1 18628 bytes
SHA-256: 0face4c994977258c5b75d4e8d8705768a4ec09c316ae5d82e3d2938a44d0e6e

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