Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba28a4f90b95eded…

MALICIOUS

PDF

44.9 KB Created: 2021-06-07 19:00:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 34aca33e784f138bbc3119e4ff5080ff SHA-1: 8a2a3eac61ceae4bd374b2d39b9518a2fad801ce SHA-256: ba28a4f90b95ededdc53ab6815e1a780d116f226922ba1acd266b0f002d564ee
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 0.9865

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/assasin-roblox-hack-script-game-hack PDF link annotation
    • http://pia2000.net/images/2021-roblox_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/how-to-hack-pubg-mobile-uc-without-human-verification_GM1330123889.pdfIn PDF document text
    • http://pia2000.net/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/infinite-robux_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/hack-roblox-script-pastebin_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/pokemon-go-free-zip-code_GM1094591345.pdfIn PDF document text
    • http://pia2000.net/images/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-viking-quest-hack_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_off00004f27.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F27 25916 bytes
SHA-256: e32b37994478ace02c6a267d358eae4300c6256d0deaa33f6d29e5eb1643863e
font_01_sfnt_off00008bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDC 18580 bytes
SHA-256: c69f168080bead46a9d4f962bce25cac1fdf6cd78ed44226c626be9f86b6ea9d

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