Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3eeca3ae241a62…

MALICIOUS

PDF

33.6 KB Created: 2021-07-09 04:39:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8e8b60f10b321bce1405e5631411092d SHA-1: 1b0e219e0306e4d4dfcbb1ef1511874926f744cb SHA-256: 8b3eeca3ae241a62296fc186e0040ab87c05f112c8241a3a3e4f214e8a9bfbd1
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.tw/app/431946152/how-to-hack-roblox-games-game-hack.
  • 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/431946152/how-to-hack-roblox-games-game-hack PDF link annotation
    • http://cintabaca.org/katalog/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/robux-hack-tool-download-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-catalog-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/pubg-uc-free-redeem-code_GM1330123889.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hack-that-thing-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/cheat-codes-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-download-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/azupte-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/pokemon-go-free-zoom_GM1094591345.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-create-avatar-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-cheat-in-yin-vs-yang-ninja-assassin-roblox_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
font_00_sfnt_off00002d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D15 22096 bytes
SHA-256: fd4f37baf2f489e4395c66d0deb99f298d79f23b05526e598ba48f280d0ac88f
font_01_sfnt_off00005e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0D 19080 bytes
SHA-256: c7de099e57cfd7f442f0afeba5034f70bb3b049a86a5e548322d77ee9b6e5cee

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