Malicious PDF — malware analysis report

Static analysis result for SHA-256 320b18fcac5ff401…

MALICIOUS

PDF

34.0 KB Created: 2021-06-30 16:47:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 13b7902e3b2ae3780e5777cb5eba2f6a SHA-1: 389c2bc8e9c0636e95776c94ae889eaa29867515 SHA-256: 320b18fcac5ff40105b824ff14f883520f43e562117f72c29031662ac9a96530
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/https-roblox-hacks-game-hack. The document body and embedded links suggest a lure for game-related cheats or generators, a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection, likely leading to a further stage of attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/https-roblox-hacks-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hacker-tucoon_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/tiktok-free-folowers-free_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-generator-for-card-roblox-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/pubg-300-uc-price-in-india_GM1330123889.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/anti-speed-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-dungeon-quest-hack-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-troll-players-script-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-android-oyun-club_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-the-antine-villa-roblox-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free4mobile24-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/pokemon-go-free-download-for-pc_GM1094591345.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spin-and-coins-links-2021_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_off00002ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBC 22136 bytes
SHA-256: e8b1f7302153e3a57026caca65cb002fafe799dabef4e71b0a2f665b7cdadcc9
font_01_sfnt_off0000600a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600A 18936 bytes
SHA-256: af178a7ed13a2141c1c6d4faa8fb1ffc2f3c38e864a4e22ab7bb9e47b972671e

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