Malicious PDF — malware analysis report

Static analysis result for SHA-256 611689cd337ee229…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 12:11:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3b160f4a0502091f29113756a8f55e70 SHA-1: 086d937cdbd596e832e41ff63c9de6000de689e5 SHA-256: 611689cd337ee2297d4568ab6df319d2ba5b7842881bcd94939a6a0b07a7a014
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links to a known malicious redirector, masquerading as a 'game hack' or free currency generator. The primary lure is the promise of free Minecraft or Roblox items, directing users to http://netcdn.tw/app/479516143/how-to-get-minecraft-windows-10-for-free-2021-game-hack. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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/479516143/how-to-get-minecraft-windows-10-for-free-2021-game-hack In PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-hack-roblox-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/apps-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-roblox-code-in-muder-mystery-2_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-hacks-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-a_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-hack-robux-download-2021_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/boku-no-roblox-remastered-hack-script_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-hilton-hotels-interview-hack_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-download-hack_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/games-that-give-you-free-robux_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_off00002f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9D 22420 bytes
SHA-256: c3cfeab86b1560c71817e1e058358ad140ffa8451a02b385678bda49df196c2f
font_01_sfnt_off000060f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F4 18936 bytes
SHA-256: d89f9173c68b5ad3f200cf0910130a7487f46ddf269ae4e48135fb236ee99bed

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