Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a1cd5c14f7507e…

MALICIOUS

PDF

44.9 KB Created: 2021-05-14 22:48:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 47f8cf5d338a3a1a1707dd1491bef0df SHA-1: 298b72f5bfb8b51f1c088bd20ddbf46982c7497e SHA-256: b5a1cd5c14f7507e8f51bb1bbdaf46ed33f691159360ad5743f6861a33cd0fb6
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 0.9632

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.xyz/app/406889139/hack-coin-master-apk-mod-game-hack PDF link annotation
    • http://hindicenter.com/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://hindicenter.com/images/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://hindicenter.com/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000495c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x495C 25584 bytes
SHA-256: 56018149f7b1b7272fec18dd73f7d62898ce15c0e4183ff35d92db056be980a1
font_01_sfnt_off000083b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B9 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5A 18068 bytes
SHA-256: 9a1fe8593802629ca91e824aef9790fcb981ac5ee6ac3e1bb8e6d1b292261c5d

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