Malicious PDF — malware analysis report

Static analysis result for SHA-256 c28d27d7e26c9b81…

MALICIOUS

PDF

41.7 KB Created: 2021-05-13 07:05:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e0edb261d301bbee3f0927e36f389ea1 SHA-1: 68eaeacb5e4e2ae33b3ce28703e805c219b6b945 SHA-256: c28d27d7e26c9b816872874bb7d4e915e1eecff4e2ec6cfa9209577f7135714e
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites that are advertised as 'free generators' or 'game hacks'. The primary link, https://netcdn.xyz/app/431946152/how-to-get-free-roblox-money-game-hack, and numerous others hosted on ristorantimaculan.it, suggest a phishing or scam campaign designed to trick users into visiting potentially malicious sites. The document body and heuristics confirm the presence of these lures, indicating an attempt to exploit user interest in free in-game currency or cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.xyz/app/431946152/how-to-get-free-roblox-money-game-hack In PDF document text
    • http://ristorantimaculan.it/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://ristorantimaculan.it/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://ristorantimaculan.it/images/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://ristorantimaculan.it/images/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://ristorantimaculan.it/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://ristorantimaculan.it/images/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ristorantimaculan.it/images/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ristorantimaculan.it/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • http://ristorantimaculan.it/images/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://ristorantimaculan.it/images/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://ristorantimaculan.it/images/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • http://ristorantimaculan.it/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://ristorantimaculan.it/images/coin-master-attack-madness-hack_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_off00004700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4700 25052 bytes
SHA-256: 3bc689b758ca790638695dde1dcaeb626d1fc91298a2a1bc30ae0715b9613b8e
font_01_sfnt_off00007f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F80 18592 bytes
SHA-256: b73f1f0d33754a6311a400e0f9b7fa1bed8423beec91854f27c9eb8add8b4fcc

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