Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee93cb6db9ab422…

MALICIOUS

PDF

44.2 KB Created: 2021-06-13 22:17:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: cfce322157f1c507f7991f9f3532a384 SHA-1: 567dd7acd09a22dd72427d94c3a69316c0e148f1 SHA-256: 6ee93cb6db9ab4222556dbbc0b153df39350a51d71130fad8d08df4669225be6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one pointing to known malicious redirector infrastructure. The document body and embedded links suggest a lure for free game items or hacks, likely intended to lead users to a phishing or malware download site. The presence of embedded URLs and the nature of the lures indicate a social engineering attack aimed at tricking users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/431946152/2021how-to-get-free-robux-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/plutonium-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/louka-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-codes-for-the-floor-is-lava-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/get-coin-master-free-spin_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
stream_003_off00004a53.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A53 27404 bytes
SHA-256: 2a5fc9e00e1d0177aba3908127aec82618a1b315b616de3bfdf8234e3f8951bf
font_01_sfnt_off000088bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88BC 18848 bytes
SHA-256: 80b7605bd9c6576725c08f57ae75eb5c1b3236a1a1a3639cad7a566c4453155e

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