Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b8dcdb1c49a9f46…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 12:46:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1a6e36557f827b6311c466e302c50165 SHA-1: d0e6cc556367afcef0b783d4703dd34ec0f37478 SHA-256: 1b8dcdb1c49a9f4697b6444e2842b884a88e0be90208dc898f44efba4efc4341
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. 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 0.9980

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.tw/app/431946152/free-headless-head-roblox-game-hack PDF link annotation
    • https://new-era.com.tw/image/data/files/how-uc-pubg_GM1330123889.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-for-lg-phone_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-on-moneysee_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-best-looking-free-avatar_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/cheat-prison-break-roblox_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-hack-robux-2021-pc_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_off00002ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC2 22468 bytes
SHA-256: 403cb9c470a6f3c734452dff10ac50d7cf818019d8906af5fb215381c536710b
font_01_sfnt_off000060f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F4 18824 bytes
SHA-256: 7384526ce2dd4d92cd45550fda12bae152729c1e692f7aa7bf6070bc228cd510

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