Malicious PDF — malware analysis report

Static analysis result for SHA-256 13686119f9013742…

MALICIOUS

PDF

44.2 KB Created: 2021-05-16 06:01:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f41a8a3120e9c8d3a9668bfda400d4ae SHA-1: 90f52bc12c4e7b5a06419da2bf55f058f05bc558 SHA-256: 13686119f9013742376f7e5e9e2f4edd04965869a3a82cedcf21570b8d010a46
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users with promises of game hacks and free spins, directing them to potentially malicious websites. The primary link, 'https://netcdn.xyz/app/431946152/how-to-hack-people-on-roblox-game-hack', is flagged as a malicious redirector. The document body, though partially corrupted, contains similar lures and references to the malicious URL, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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-hack-people-on-roblox-game-hack In PDF document text
    • http://www.viniperfetti.com/images/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.viniperfetti.com/images/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://www.viniperfetti.com/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://www.viniperfetti.com/images/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://www.viniperfetti.com/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://www.viniperfetti.com/images/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://www.viniperfetti.com/images/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://www.viniperfetti.com/images/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.viniperfetti.com/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.viniperfetti.com/images/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://www.viniperfetti.com/images/wurst-mc_GM479516143.pdfIn PDF document text
    • http://www.viniperfetti.com/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.viniperfetti.com/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://www.viniperfetti.com/images/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://www.viniperfetti.com/images/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://www.viniperfetti.com/images/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://www.viniperfetti.com/images/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://www.viniperfetti.com/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.viniperfetti.com/images/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://www.viniperfetti.com/images/minecraft-pocket-edition-apk-free-download_GM479516143.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
stream_003_off00004da9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DA9 25724 bytes
SHA-256: 83f21d980053261064384e8dcf7e6b70d592b50f279748c34dfb6f21f7d35ad6
font_01_sfnt_off00008938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8938 18676 bytes
SHA-256: 9439cdf519c477105af26a237b903c28353edd649090bb99f856962d56c9ecd1

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