Malicious PDF — malware analysis report

Static analysis result for SHA-256 918bbc9bf5da83a4…

MALICIOUS

PDF

44.3 KB Created: 2021-05-19 14:19:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: da97a78a06579c763a8ed225cc1a93c6 SHA-1: 55f4ca29a5504937c211460f789ac11aeae8226c SHA-256: 918bbc9bf5da83a4871f0955dac81a7b597c1fd23a7c231ddda1ed1412334251
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and followers to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document body contains obfuscated text and multiple URLs, reinforcing the phishing and redirection 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 https://netcdn.xyz/app/835599320/free-tiktok-followers-game-hack In PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-g_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/get-free-spins-on-coin-master_GM406889139.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://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000499b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499B 29792 bytes
SHA-256: d57ed0b4c0da365ab3133f913af12fd7b453f9be1ea11ff265e9db7d7196616f
font_01_sfnt_off00008cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEF 17692 bytes
SHA-256: ba2215a0f2290c6faad19fe6968ba231152e54b1cb241ca137cf69db350684c8