Malicious PDF — malware analysis report

Static analysis result for SHA-256 741172c29f7a6db9…

MALICIOUS

PDF

45.9 KB Created: 2021-06-09 04:53:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5950ac1be3767028564a936fdec24037 SHA-1: 5a31f596096a0cd57e55e2a4cd2faa0a31e5876b SHA-256: 741172c29f7a6db9692091098de5ce90d1d559919fa7283cee4a9fb572f4fe70
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/how-to-get-your-roblox-account-back-if-hacked-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/robux-get-com_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/pubg-uc-full-form_GM1330123889.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-creepypasta-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/2021-free-spins-coin-master_GM406889139.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_004_off000052fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FA 26184 bytes
SHA-256: 3512acafae05e85f4cb8acf2ad48c292bfdf1f62793e91fa7ef65f017278134c
font_01_sfnt_off00008eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB9 18924 bytes
SHA-256: 7a6a414f97b3d455af77442730db28d8441d60d48d8fb33f7614734802a09187

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