Malicious PDF — malware analysis report

Static analysis result for SHA-256 f028829c400830ed…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 04:21:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7c45692dbfdd9e7a60fb07c9e26fe86d SHA-1: 764a3cff837717ac5c59a6e72fbe5f39c2505646 SHA-256: f028829c400830ed45210cfe2364a339c7929ade63974140bcf736af5449eb51
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/479516143/how-to-get-minecraft-coins-for-free-game-hack PDF link annotation
    • http://foo.com.tw/files/free-robux-generator-no-survey-no-offers_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/become-vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-hack-a-roblox-account-easy-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-captain-america-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-stuff-on-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/box-prizes-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/apk-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-hacker-us_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_off0000321f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321F 23068 bytes
SHA-256: 644368c70c983bbc1881375030ebb4cb2f82cf28794980104b918ffa3a83c170
font_01_sfnt_off000065c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C2 18164 bytes
SHA-256: 08cfef77cd0745aa004e30d27b19be38b0f906a11dfdef7a7ac194d78643726e