Malicious PDF — malware analysis report

Static analysis result for SHA-256 7818455d3aa1fd2d…

MALICIOUS

PDF

34.7 KB Created: 2021-06-29 08:09:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 20f7d8779eb16b486109ac6e330c3837 SHA-1: 8a97c22e8b08bb3653a2cb5289f035568afc464b SHA-256: 7818455d3aa1fd2d9beb2208f60893732f6b27767879ad09093eed51b5d404d4
82 Risk Score

Malware Insights

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

The PDF document employs a common lure of 'free game hacks' to entice users into clicking embedded links. The primary link, http://netcdn.co/app/431946152/roblox-free-admin-for-roblox-game-hack, likely leads to a malicious site or a scam. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a potential for exploitation or redirection, aligning with techniques like Spearphishing Attachment and Exploitation for Client Execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/roblox-free-admin-for-roblox-game-hack PDF link annotation
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021-new_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/download-roblox-for-free-on-android_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/free-robux-automatic-human-verification_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/roblox-free-rpbux_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/roblox-jailbreak-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/escape-room-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/earth-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_off00003067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3067 22272 bytes
SHA-256: 2256b2ebceeeb59b200e82e266c1532ab3c5df8b12d2120162dfe844e6f31a72
font_01_sfnt_off00006211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6211 19204 bytes
SHA-256: 4ad1bb6d93091e41e9eca2e2b0b1cb29b475b119c161bd8bb5c75bc919ee90e7

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