Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9527c83c04ecd37…

MALICIOUS

PDF

45.8 KB Created: 2021-06-07 19:42:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b8d27e95588f74dada1aa03664709186 SHA-1: 9b0aeafff0285ab955b461bfe223822e37d4cd6a SHA-256: e9527c83c04ecd37d9f7a3f912a7ace28a0edb9af697dd61006f41bf67d2c532
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 0.9864

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/best-free-roblox-exploit-serverside-game-hack PDF link annotation
    • http://brokermortgages.com/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://brokermortgages.com/images/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/roblox-gainer-free_GM431946152.pdfIn PDF document text
    • https://www.nrzroblox.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005224.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5224 27112 bytes
SHA-256: a6a1763847afe248b597267fcadca15a1709172172cf074cf752b3566654470b
font_01_sfnt_off00008f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F86 18636 bytes
SHA-256: 998385f02a97ccbc74d7da527019b98e6dd6bcd4235b945b4f72a29406979bea

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