Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fea5fcf0a881e1…

MALICIOUS

PDF

43.1 KB Created: 2021-06-04 02:54:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 07182fb5853dac85d812943cda82e72f SHA-1: 43e0d116668684f47ad0160510e0638663fd9cd9 SHA-256: a1fea5fcf0a881e19edc5fc5ef3ab3ffc914bc13858c6f4febef52a4fdaf3e7d
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 0.9874

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.online/app/406889139/get-free-spins-coin-master-link-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/rbx-sites_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-private-server-roblox-strucid_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/best-free-t-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-coins-link_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_off00004fbf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FBF 23956 bytes
SHA-256: 4ce2eb7cfc978d4099edfd34c59832fefd00ebc3511387eae112252e857bf4e7
font_01_sfnt_off0000865c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865C 18056 bytes
SHA-256: ab85056fbf29cd03dcfab7de7beb0343ed26656e2e8858e8ad52cb7aa31a5a92

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