Malicious PDF — malware analysis report

Static analysis result for SHA-256 5856bb60db4d8d0d…

MALICIOUS

PDF

35.9 KB Created: 2021-06-30 20:23:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9a7aa90de2d823d8a4fc57bd6eac05d4 SHA-1: 6d1bf8269568ab94f5089f18e8954ecbdf96a187 SHA-256: 5856bb60db4d8d0d030c423f7b888d48e4d5f3dab4f073fce64b6a4a39224fde
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and other PDF files, masquerading as free game hacks and cheats. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK' indicate a clear intent to redirect users to potentially harmful content. Although no scripts were extracted, the document body and heuristics strongly suggest a phishing or social engineering attack aimed at tricking users into downloading further malware or visiting malicious sites.

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.co/app/431946152/free-ways-to-record-roblox-with-voice-game-hack In PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-to-get-free-robux-fast-and-easy-2021_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/best-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-robux-21-01-2021_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/roblox-hacked-client-2021_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/nuevos-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/roblox-kicked-by-server-cheat-engine_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-to-get-free-robux-on-computer-fast-2021_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/soul-dynasty-roblox-hack_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/earn-free-robux-with-points_GM431946152.pdfIn PDF document text
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/coin-master-free-spin-and-trading_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
font_00_sfnt_off0000333c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x333C 22520 bytes
SHA-256: 6d1e9c7bbc19a7b8d51a8cd2f840796eb7d93f3aff43e338bc022821710f2c0c
font_01_sfnt_off0000653f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653F 19724 bytes
SHA-256: 9d2f5131a48be9b7989a7c8e86ccfb112032726c25df62b55f01fd991d6d2863