Malicious PDF — malware analysis report

Static analysis result for SHA-256 a801bf86aadc1d71…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 15:06:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 11136318560a3d7428bc587f385b818b SHA-1: 52fbe0ea89aaba70346282c2305d629a1eb9df3f SHA-256: a801bf86aadc1d71ee28f0ee49543565d290ab36f13e82adc4e0ceefb4831731
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.tw/app/406889139/how-to-hack-coin-master-spin-ios-game-hack PDF link annotation
    • http://digilibfisip.unla.ac.id/repository/roblox-hack-cheat-tool_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-accounts-2021-november_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/como-distinguir-a-un-hackear-de-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-bc-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/best-free-games-to-play-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-obc-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/wwwhacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/is-overdrive-roblox-exploit-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-usaf-lackland-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/como-hackear-robux-en-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/pokemon-go-free-xp_GM1094591345.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-use-wurst_GM479516143.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_002_off000030a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30A4 23516 bytes
SHA-256: 7ad68284005e4e4217a423a3a7f8c78d9718134dbbc4370aee9332157bac341f
font_01_sfnt_off0000660b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660B 18344 bytes
SHA-256: 26c495ddad6d19752d7b7d64abb9194f782c68fd49d6baac122766a6904e49cd

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