Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd0b4ac381bc7b5…

MALICIOUS

PDF

33.8 KB Created: 2021-06-26 16:27:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c8fff1102133bec5442a1ad728e5b4d6 SHA-1: c15b2d50df4206988479d5ff416be758c5835b45 SHA-256: 0fd0b4ac381bc7b5824379094185a5c5f69273e97ede16ac95c7c9305ac57a08
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that are identified as malicious redirectors, specifically targeting users with lures related to game hacks and generators. The primary malicious URL is http://netcdn.co/app/431946152/robux-hacks-real-game-hack, which is presented as a 'free generator / game hack'. This indicates a social engineering tactic to trick users into visiting potentially harmful sites, likely for further malware delivery 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/robux-hacks-real-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/all-free-xbox-roblox-skins_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/tiktok-free-comments_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/get-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-robux-back-if-i-was-hacked-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/can-we-hack-roblox-with-fe_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-god-mode-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/pokemon-go-free-pokeballs_GM1094591345.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_off00002db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB3 22508 bytes
SHA-256: f4976227b2d9f53ec565088501f6ab5dadf75f7374068ebbf7b3652ad30b730b
font_01_sfnt_off00005fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 18796 bytes
SHA-256: b1c4b1e508c637528f0c74ffdc8e86e1ca43b0b99fbbad468223c146bca7e727

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