Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c242a239e35025…

MALICIOUS

PDF

32.9 KB Created: 2021-07-19 04:04:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: dc80611d91d3bf637db2dc7fd0f763fd SHA-1: 55d9fd1e3f493642e83d4a11de84f4d2ecbdc094 SHA-256: a1c242a239e35025d12b8303fdd30b1f4cb8be61c900c3589a3e9b673979a928
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to "free Robux" and "game hacks", directing users to a malicious URL. The document body and heuristics indicate a clear intent to redirect users to potentially malicious content hosted on external sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/431946152/apps-to-get-free-robux-game-hack PDF link annotation
    • http://unifieo.br/images/free-tiktok-like_GM835599320.pdfIn PDF document text
    • http://unifieo.br/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/robux-hack_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C60 22352 bytes
SHA-256: 75a37c4fa4959aa952b4e8bc79a601f98768c0096742d85c65801712cf0824c2
font_01_sfnt_off00005df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF5 18480 bytes
SHA-256: 5adc42e6ee0c4a9aa68860894580334acf05e1ff62bdf9cc2e4be84be310e939

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