Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b19efea065136c…

MALICIOUS

PDF

34.0 KB Created: 2021-06-29 22:41:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c60cb969ffc6ce87162aac4a02053c7d SHA-1: 1a8f68237cee311bdf8db862ff46e93ec46bd536 SHA-256: 14b19efea065136cb9f12210d7bbfc6126ceab55aca2c69ada5129c7b288cd53
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/half-hacker-half-guest-roblox-300x300-game-hack. The document body and embedded URLs suggest a lure related to game hacks and free accounts, likely intended to trick users into downloading further malware or visiting phishing sites. The ML classifier also strongly indicated maliciousness.

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/half-hacker-half-guest-roblox-300x300-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-com-accounts_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/cheat-codes-for-tower-defense-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-noob-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/freerbx-info-for-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/new-oilgarchy-hack-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/cheat-codes-vehicle-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-faces-on-roblox-2021-on-computer_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-freeze-players-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA9 22188 bytes
SHA-256: de57423a02277c51086f04b3e4982f383bd0aecd488af9cadf97de7982a90339
font_01_sfnt_off00005eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EED 19248 bytes
SHA-256: 34676e99a5e0bc4e0cd37e4ae615ace25dc685038c04d36c4ea3c885209274ac

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