Malicious PDF — malware analysis report

Static analysis result for SHA-256 58bdb596ebf2d8c1…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 02:14:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e42ff05f553beffa315df940a0df022d SHA-1: 7334185c45bac61d9fe49d99e12c1034c93c3845 SHA-256: 58bdb596ebf2d8c1f806eaa0b1063868c255fe9d850545239f5025515c79fe0a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, http://netcdn.tw/app/431946152/free-robux-codes-game-hack, masquerading as a generator for free Robux and game hacks. The document body and embedded URLs reinforce this lure, aiming to trick users into clicking through to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam 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 http://netcdn.tw/app/431946152/free-robux-codes-game-hack In PDF document text
    • https://www.planetzoe.hr/files/hack-de-robux-en-roblox-2021-diciembre_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • https://planetzoe.hr/files/roblox-dot-truck-free_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/roblox-free-robux-items_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/does-zyz-ork-to-ge-free-robux_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • https://planetzoe.hr/files/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • https://planetzoe.hr/files/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/roblox-account-free-robux_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/eating-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/how-to-get-robux-free-on-pc_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://planetzoe.hr/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • https://planetzoe.hr/files/free-robux-codes-2021-june_GM431946152.pdfIn PDF document text
    • https://www.planetzoe.hr/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • https://planetzoe.hr/files/free-robux-codes-hack_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_off00002dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DBF 22484 bytes
SHA-256: ec56ab84eb83a0edc1e6d5de391d67cc687e14c59eeaf950df76be0f92f29044
font_01_sfnt_off0000602b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602B 18888 bytes
SHA-256: 0b210ae1d2f25d9b8ac974921f9fa88679103a832855b836aa7747c7a59cf8bc

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