Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1e56a3b7ae589c…

MALICIOUS

PDF

34.0 KB Created: 2021-06-30 13:18:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3d3b86bacd6ba6cb017112c7f933daa7 SHA-1: 639f091bc099dbaeebdd2968488f67ad23eb3cc8 SHA-256: fe1e56a3b7ae589c49b1a1cdabf538bc1c634cd4c25319db7e9f15dd11d83d28
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to free game currency and hacks, directing users to a malicious redirector. The document contains a large number of SEO-optimized PDF links, suggesting a link farm or content spamming operation. The primary malicious URL identified is http://netcdn.co/app/431946152/how-to-get-bloxburg-for-free-roblox-game-hack, which likely serves as a gateway to further malicious content or exploits.

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/how-to-get-bloxburg-for-free-roblox-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-sites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-bandana-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/get-free-robux-and-bc_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-wins-in-anarchy-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-card-codes-no-survey_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-dreamscape_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-can-you-hack-get-coins-in-roblox-knife-capsules_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/glitch-things-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/rbxraincom-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-robux-for-free_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_off00002e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E9E 22200 bytes
SHA-256: 20a45d1713086f8ce00665fa1399f2737bd5fb2ba7651d20a2683a213635e095
font_01_sfnt_off00005fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCC 19056 bytes
SHA-256: e9dfb6d68b1cfef51cb479b48696be240691885cc0135994afa95c325edfceb3

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