Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f8486d8010ecc5…

MALICIOUS

PDF

44.2 KB Created: 2021-06-14 00:09:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a053f099467b4dd2d2325779eb311006 SHA-1: a9eea14a59e51492c6abae5fa9778041cf434519 SHA-256: e5f8486d8010ecc52a8bfedcc7e54cded565388b3c46607dd7920eacfd5316e3
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 0.9980

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.co/app/431946152/roblox-booga-booga-cheat-engine-how-to-get-unlimited-essence-game-hack PDF link annotation
    • https://pasca.unisba.ac.id/elibrary/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-roblox-injectos_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/robux-hack-for-real_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-hack-on-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/100-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/robuxin-robux-hack_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/games-that-give-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-salvage-hacks_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-robux-today_GM431946152.pdfIn 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_003_off00004b74.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B74 26288 bytes
SHA-256: 3546b5823414f7b805d64f8da971ee5b64bb08e398ca57d96140a4eabedde7df
font_01_sfnt_off000086f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F8 19472 bytes
SHA-256: 85066f5022a581143446713accab76076657d3068832cc2f461cbd391d7f185b

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