Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab95e7b39b3fcb93…

MALICIOUS

PDF

48.9 KB Created: 2021-06-09 02:44:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9884956a4f2b4e66d65f191b86ed3b4f SHA-1: 242c53dc0b5964d8b5abd5eb07494edc7ff117db SHA-256: ab95e7b39b3fcb93cfe6c1da424052438a142420181cebd6a33b0c4817c32b5b
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 0.9796

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.tw/app/431946152/roblox-hacked-download-apk-game-hack PDF link annotation
    • http://unifieo.br/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/how-do-you-get-bloxburg-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-spin-link_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/rbl-robux-gives-hack_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/download-robux-hack-no-downlowdes_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/pubg-uc-dundle_GM1330123889.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://unifieo.br/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/coin-master-daily-spins-and-coins_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_004_off00005132.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5132 28524 bytes
SHA-256: c39b08d6b2f4eb5a44ab67633454f30fdd40a121aa193f61f10018bec06ae4b4
font_01_sfnt_off000090ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90CA 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7C 18864 bytes
SHA-256: fb85b2b97592981eb2d91d61e41e982f1754377690fece087992588216188084

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