Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df82f606e0cb536…

MALICIOUS

PDF

34.8 KB Created: 2021-07-07 06:48:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 49c3eafb5dac38553900f5c0c84118e5 SHA-1: 90739045f3b57ff89bb935fedcf8c1a31f468873 SHA-256: 4df82f606e0cb536b8a66eaa804eb11192f8044b6a56f3e5e37f416782cb60fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'Roblox Tix Generator' and 'game hacks'. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely serve as a lure to download further malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.tw/app/431946152/roblox-tix-generator-game-hack In PDF document text
    • https://www.tiancom.com.tw/upload/files/vehicule-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/pokemon-go-windows-free-download_GM1094591345.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-hacks-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/bad-business-cheat-roblox-tuto_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-tee-shirt_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-advance-roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-cheat-engine-681-scripts_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-quick-and-easily_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-800-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-hack-any-roblox-account-march-2021_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
font_00_sfnt_off000030ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30ED 22756 bytes
SHA-256: 0b068e2456fa961bb960cc20bfff6e8352bd12b1c17d0121618985d316dad206
font_01_sfnt_off000063be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BE 18708 bytes
SHA-256: daa22b8bb005331fde74502c960c52189fe341f913bf736a77593826474d8f92

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