Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c0ddf99bc57f42…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 15:39:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9eca20b5a4a12179c73bf797b940fb3f SHA-1: da406fbf66c3b967a36977d95cd0c8311627ca04 SHA-256: d5c0ddf99bc57f428875a68c10e074e07b59f95b29b2ccfe938a6e15a9e97fc4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to 'netcdn.co', which is flagged as a malicious redirector. The document body text and extracted URLs indicate a lure for 'Robux Hack' or 'game hack' generators, aiming to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a malicious redirector workflow, likely intended to deliver a second-stage payload or phish for credentials.

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/robux-hack-no-download-game-hack In PDF document text
    • https://mbbs.hr/files/pokemon-go-fest-free-tickets_GM1094591345.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-army-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-change-your-speed-no-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-anime-roblox_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-only_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_off00002ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF8 22888 bytes
SHA-256: aecaa425678bc9107c8099c5f82adee0ab3a31cca26584fda9d4c20f906054bc
font_01_sfnt_off0000627d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627D 19304 bytes
SHA-256: 5c0bdd3e979dc0007c98ac8663ed3069f5810113c77c96e719185d73e7bc5021

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