Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd9235d6cca3a03…

MALICIOUS

PDF

43.7 KB Created: 2021-05-11 17:33:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: aee62408fb3aca04274aabcf9fba116d SHA-1: 0ada1f9c5bbe3167af1c2fbabe90255646a19561 SHA-256: 7cd9235d6cca3a03b7b542a4b4797706d300276439ae0592b0d17dfea99cf670
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and link farms, masquerading as game hacks or generators. The primary lure URL is https://netcdn.xyz/app/431946152/earn-robux-com-game-hack, which is designed to trick users into clicking through to potentially harmful content. The document body and embedded links strongly suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 https://netcdn.xyz/app/431946152/earn-robux-com-game-hack In PDF document text
    • https://lib.unitri.ac.id//repository/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-roblox-acc_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-apocalypse-rising-hack_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
stream_003_off00004c40.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C40 25864 bytes
SHA-256: d589cb91accd61288d766a69d259bbe1c960241aba2bde931df778aacd60fc43
font_01_sfnt_off00008873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8873 18340 bytes
SHA-256: 73022d66eecee4efafff23453c98f7b2dd1a6a21145ea515066a8a3f3a15b160

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