Malicious PDF — malware analysis report

Static analysis result for SHA-256 156a8aa7bf05fe8b…

MALICIOUS

PDF

45.9 KB Created: 2021-06-09 08:54:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fbab14017fa08b6bcf6cc22b5c06bc59 SHA-1: 1b46469dbcda341ecb8cc379263ffc8fed60fe47 SHA-256: 156a8aa7bf05fe8b9c9aceb2123c0f690666e99ec0434868e1dfe39195c586b7
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 0.9864

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.tw/app/431946152/como-hackear-la-cuenta-roblox-game-hack PDF link annotation
    • http://hardbit.cn/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/wwwfree-robuxcom-free-robux-now_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/pubg-uc-kodu-yazma_GM1330123889.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/coin-game_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-discord_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
stream_004_off000052ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52EC 26584 bytes
SHA-256: 77a3b097c69b0418decd7dc50349c0db0e3bee25250374b90ba03f9435362176
font_01_sfnt_off00008f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9A 18684 bytes
SHA-256: b4236491032fdd1f5a043a5aaad2aa974501e894331d3ca0b58dbfba63626a47

Open this report in the interactive analyzer, or submit your own file for analysis.