Malicious PDF — malware analysis report

Static analysis result for SHA-256 e450da25abe58cf9…

MALICIOUS

PDF

34.1 KB Created: 2021-07-09 21:28:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6c8edc9b0ecee2ddcd47e32ae1d342fb SHA-1: ed6191e8d8af6a6b335dce9eb23984acb1e12ed8 SHA-256: e450da25abe58cf9856bb9d021f804fd2d83bc016550a73a6c0e8d2db1741e68
160 Risk Score

Malware Insights

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

This PDF document employs a lure of game hacks and generators to entice users to click on links. The primary link directs to a known malicious redirector infrastructure, which in turn serves further malicious PDF files. The document body and heuristics indicate a social engineering tactic to trick users into downloading potentially harmful content.

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/earn-roblox-game-hack In PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-generator_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-hack-teleport-and-wool-and-speed_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-dll-hack-download_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/generate-free-robux-gnome_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-get-free-robux-ios-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/cheat-engine-roblox-mac_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_off000030d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D3 22104 bytes
SHA-256: e114c52bca307e33cc30222560033f0de668b513d2113436830a08aba79dc8a5
font_01_sfnt_off000061d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D3 18484 bytes
SHA-256: 8cba056027220f5c23c1ca3699a63c26fe64a99975d9f84dc7ec4e72a8f0a8a9

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