Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd4ed26512a57220…

MALICIOUS

PDF

38.0 KB Created: 2021-06-20 15:49:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 52517da2e291fc15b64e13d0580121fb SHA-1: e397ba782918120b775d37e702225109ab830ea5 SHA-256: bd4ed26512a57220451252750274aeee253529f3d1b66090b0af2f334a634106
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack lure. The embedded URL, http://netcdn.co/app/431946152/hack-work-at-a-pizza-place-roblox-game-hack, is likely the initial landing page for a malicious download or phishing attempt. No scripts were extracted, but the document's structure and embedded links strongly suggest a social engineering tactic to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.co/app/431946152/hack-work-at-a-pizza-place-roblox-game-hack PDF link annotation
    • https://www.tiancom.com.tw/upload/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/www-robuxmaniac-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-cool-stuff-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BFE 22764 bytes
SHA-256: 9fdc42399d9b6ba746faff12d5436b2851154a0f1a81d91802d297270dca775c
font_01_sfnt_off00006ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED1 19312 bytes
SHA-256: 113aa3c10e17506978c433b5106007765a95ab35804c35e14df558a72feccc4a