Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1dffb98ca41cfcf…

MALICIOUS

PDF

34.8 KB Created: 2021-06-19 09:31:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 361bc4fdd512a0128500d1782a1f98d8 SHA-1: c90a8876e6f3f9a2dcb710dc5f000438fb04ff54 SHA-256: f1dffb98ca41cfcf365bf82eeca85819eb40c60f76d87691f80fab7f93ca6886
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links disguised as generators or hacks for popular games like Robux and Coin Master. The primary link, http://netcdn.co/app/431946152/completely-free-robux-game-hack, is identified as a malicious redirector. This suggests the document's purpose is to trick users into visiting malicious websites, likely for further exploitation or credential harvesting.

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/completely-free-robux-game-hack In PDF document text
    • http://www.stttekstil.ac.id/elib/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-gamepass-roblox-script-not-patched_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/pastebin-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/tiktok-views-free_GM835599320.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-rocitizens-how-to-get-free-money_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/impact-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hack-any-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-don-t-have-to-do-anything_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-make-free-robux-with-bc_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-robux-promo-codes_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_off0000300e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300E 22240 bytes
SHA-256: 27ea2684c8d1d6a9e0dd5c21396a6bea07be0a35d0ca3a1a35f8479ddb66a180
font_01_sfnt_off0000618d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618D 19508 bytes
SHA-256: 6e6a6b26869d81855c0b3f4e7c1dfe2aee243c73fbebb29f49c49cbeb35a4b11

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