Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c544b0aaf1824bd…

MALICIOUS

PDF

32.5 KB Created: 2021-06-20 02:06:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 408e7065e02b9aa45ef61acadf0598df SHA-1: 7dcdd89a882a81110f2c6c0209d6f74c41f15ded SHA-256: 6c544b0aaf1824bd97c35eb6008eb8d99743eea17a5a80da7099e3800b025cc3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector hosted on 'netcdn.co', which is flagged as malicious and associated with 'free generator / game hack' lures. The document body explicitly mentions 'Roblox Cheats For Ios' and 'Robux Generator', reinforcing the phishing pretext. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-cheats-for-ios-game-hack In PDF document text
    • https://uofk.edu/images/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • https://uofk.edu/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/pokemon-go-free-in-app-purchases_GM1094591345.pdfIn PDF document text
    • https://uofk.edu/images/free-catalog-stuff-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/can-you-use-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/hacks-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/roblox-free-robux-generator-no-download_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/how-to-deal-with-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • https://uofk.edu/images/galaxy-roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/robux-fre-codes_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/free-roblox-merch_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_off00002926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2926 22280 bytes
SHA-256: 31a6477785763d3c8498af674d963a325e843d54ef1fe267ce911bddf0c321b2
font_01_sfnt_off00005ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB9 18920 bytes
SHA-256: b738ca6d10c8820c1bcd7bf6859cedbd5aa942ff634ddff84faa17311271186f

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