Malicious PDF — malware analysis report

Static analysis result for SHA-256 16178c8b8220aceb…

MALICIOUS

PDF

34.5 KB Created: 2021-06-30 05:27:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2b20908d4e827f041ac78894a3b83e3d SHA-1: a3f66a88450bfcd796ebbbc1359273e05673e4ac SHA-256: 16178c8b8220aceb2f156d1830586244de99e7861779665253dbe2d40a3062db
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and free virtual currency. The primary malicious URL identified is http://netcdn.co/app/431946152/cool-roblox-clothes-for-free-game-hack, which is linked to known malicious infrastructure. The document body reinforces this lure with text related to 'Cool Roblox Clothes For Free'.

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/cool-roblox-clothes-for-free-game-hack In PDF document text
    • http://library.atim.ac.id/repository/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hackeando-ordenadores-en-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-admin-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/ghost-simulator-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-books_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-unlimited-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/como-hackear-roblox-en-meepcity_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-18_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/kupcake-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-2021-febuary_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_off00002ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED5 22880 bytes
SHA-256: b271f6436c0b3d7557bb519c68f2866571bb94ad2c578f8578aebe415fffc96c
font_01_sfnt_off00006246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6246 18920 bytes
SHA-256: 22fc6c9e62290f587156f94d9848aaa70b4d0a9ccb738477b4304ead9500df07

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