Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8b5a9ebd2b0e76…

MALICIOUS

PDF

47.3 KB Created: 2021-05-19 20:03:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e2d0382afa77bcd32af34a9bd0a11428 SHA-1: fa58559d16239751be7005bb5e9edac078954634 SHA-256: dc8b5a9ebd2b0e761bec0443f18be8a6da59bbe242372377513341b1386a6a8b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and lures related to 'free Robux' and game hacks, indicating a social engineering attempt to trick users into downloading potentially malicious content. The presence of a 'password-protected archive' lure suggests that the downloaded payload may be encrypted to evade initial security checks. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/free-robux-master-game-hack PDF link annotation
    • https://sensorcamera-tw.com/upload/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/cm-free-spins_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/pokemon-go-free-daily-box_GM1094591345.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/pubg-uc-low-price_GM1330123889.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-fan-page-free-spins_GM406889139.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_off00004737.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4737 30168 bytes
SHA-256: 26c3c75f17a3ef6f9b8f105d869b59c7c7f141d24a32334c9e44d22cb5cc8fe0
font_01_sfnt_off00008be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE4 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000095cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95CF 18544 bytes
SHA-256: 5f92163030842751a82ce86b738a68b4d97fee0a57e838fb4c20f827a47ffbab

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