Malicious PDF — malware analysis report

Static analysis result for SHA-256 de868f5754bfde77…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 06:09:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 415c2089b32289dce35239fa58ce5872 SHA-1: ec4102e92c620f2d4e1e1715cec4d9e36cbdaefe SHA-256: de868f5754bfde779add1dca9d65084407425c149b5819856759cce1e960e7f4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to known malicious redirectors, specifically advertising game hacks and generators for popular games like Roblox. The document body, though heavily obfuscated, contains references to these lures and the malicious URL. The primary function appears to be redirecting the user to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.online/app/431946152/robux-sign-game-hack In PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/roblox-g_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/free-roblox-acc_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/robuxfree-con_GM431946152.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://www.corporateprofessionals.com/uploaded_files/userfiles/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005175.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5175 24140 bytes
SHA-256: a7026be48e08f82b56d141a9d31756d342084433046f8d8cf0bd97503f60b7d3
font_01_sfnt_off000088b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B8 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off000093e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E1 18260 bytes
SHA-256: d979ccd66367cffe0923c7c168b8d9239fab8865d1d9d8d0be6a8c4d84c57473