Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7dbe856c49c2db…

MALICIOUS

PDF

33.9 KB Created: 2021-06-26 05:45:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c796bd6dca7b1ee01362d4c93b57429c SHA-1: 2b947264dabae81c588c875d19c7d9ce49122615 SHA-256: 0f7dbe856c49c2db9c021fab68d5a7c4f65fea38aba50f01d05f89e0a08e5bea
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links designed to lure users into clicking on what appear to be game-related hacks or generators. The primary URL, http://netcdn.co/app/431946152/lina-roblox-me-hackean-la-cuenta-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a pattern of directing users to external link farms, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/lina-roblox-me-hackean-la-cuenta-game-hack In PDF document text
    • http://library.atim.ac.id/repository/show-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-unused-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-free-micky-mouse-clothes_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/comment-hacker-roblox-macbook-pro_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-royale-high-halo-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/island-life-paradise-hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/glitch-hacks-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-generator-no-apps_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-download-gui-roblox-twisted-murder_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-tix-factory-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-codes-giveaway_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-app-ios_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/good-free-t-shirt-roblox_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_off00002d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D5A 22316 bytes
SHA-256: 35c48d7100e6f6be317c7747b042fe29ae322eb7569820eaff22098734d94426
font_01_sfnt_off00005ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC6 19216 bytes
SHA-256: 8875f0bd68e386f43c26c6722487a94e224d9747a574a237b5cb79f9b1477c7e

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