Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd06443e2bbc227…

MALICIOUS

PDF

34.6 KB Created: 2021-06-28 13:04:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2e8f0a20a88a4c0c5b219a1adf651c31 SHA-1: 48420f0bc52476a9b68cb4d47e4c75af91e47721 SHA-256: 1cd06443e2bbc22789800dbf06144b1a973d61d656e259e8617f7a188d9ab7fc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and free in-game currency. The primary lure URL is http://netcdn.co/app/431946152/how-to-hack-roblox-in-jailbreak-game-hack, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving users to potentially malicious websites.

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/how-to-hack-roblox-in-jailbreak-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-have-free-robux-in-a-web_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-promo-codes-2021-no-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-do-you-get-free-robux-and-tix_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/shadow-raid-cheats-roblox-notoriety_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-download-android-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/get-free-robux-by-completing-offers_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hack-amievenalive-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-free-stuff-list_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/working-coin-master-hack-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_off00003017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3017 22376 bytes
SHA-256: 3ac725b634c3e2efd170d1ba81fe4509aafd641f911aa97624f82abaaf355dac
font_01_sfnt_off00006210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6210 19104 bytes
SHA-256: 63ea40d3698f5cb36f4d0bdee32ee016d64d28cb0b3fd06cdbb408c1bc35324a

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