Malicious PDF — malware analysis report

Static analysis result for SHA-256 7211ad12c31860a1…

MALICIOUS

PDF

45.4 KB Created: 2021-06-11 04:13:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f606d91431ddb3286eb2b0fab8a874c2 SHA-1: 56c853bc962d7ebdb595e89e2df0581af94e3b74 SHA-256: 7211ad12c31860a15ba7861809cbe0b54d8c6e8bd674e88f022f99e3b99dc739
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to game hacks and expired trials, presenting a fake CAPTCHA to deceive users into clicking a link. This link, 'https://netcdn.tw/app/431946152/your-free-trial-of-living-has-expired-roblox-meme-game-hack', leads to known malicious redirector infrastructure. The document's structure and embedded URLs suggest it is designed to facilitate the download or redirection to malicious content, likely through a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.tw/app/431946152/your-free-trial-of-living-has-expired-roblox-meme-game-hack In PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/get-free-robux-codess_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-hack-roblox-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/robeats-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-roblox-codes_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • https://www.roblox.comIn 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_off00004ffd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FFD 25872 bytes
SHA-256: 00c0c9889caf6474dc27aa94ba052ce5dd09ab740031ddf2621d4f3d851b792b
font_01_sfnt_off00008a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8E 19804 bytes
SHA-256: 08b9028424a2554296964bc2b4603a2f3b523fbbe17cc06709570fab03148d7e

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