Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e696f45dfb69ee…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 08:29:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9dcace3af3a705f41bc8815258ea5995 SHA-1: 7bd3c030671c17e4f92f85bdb8868fe2ff3032e8 SHA-256: c2e696f45dfb69eecf296f6d344e667f726b8cdbf99471044bcebe175d403979
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to SEO-optimized PDF files hosted on slims.abulyatama.ac.id, and one critical link to a known malicious redirector at netcdn.co. These links are presented as 'game hacks' or 'generators', indicating a social engineering lure to trick users into visiting potentially harmful sites. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/javascript-code-roblox-hack-game-hack In PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-use-free-robux-cheat-codes_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/speed-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/caesar-emergency-department-hack-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hack-roblox-counter-blox-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/earn-robux-com_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-gift-card-cods_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/gfun-games-to-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/village-4-coin-master_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_off00002fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDF 21868 bytes
SHA-256: 5c1772dbbce12680b45512ae414d5bbb5bde255750a328e1718da78b75c7bef6
font_01_sfnt_off00006023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6023 19512 bytes
SHA-256: 63cd3f0ef6337d4729275987e837da96bc1be10461048083db8df061fa0bd2e3

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