Malicious PDF — malware analysis report

Static analysis result for SHA-256 c25dfab84c8e3ea1…

MALICIOUS

PDF

33.9 KB Created: 2021-06-29 13:06:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5de7bc3b8cba6426ff53ef4208a88a41 SHA-1: f407edb9d282949b711c0eb42e4140d6529d154f SHA-256: c25dfab84c8e3ea1cdb5ad5162f6fc82fb09aef7cfebb73eee20fff196f46924
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link that redirects to known malicious infrastructure, disguised as a lure for game hacks. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attempt, likely delivered as a spearphishing attachment.

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/roblox-free-exploits-game-hack In PDF document text
    • https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-robux-form-hectic-plays_GM431946152.pdfIn PDF document text
    • https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/roblox-how-to-get-a-dominus-for-free_GM431946152.pdfIn PDF document text
    • https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-stuff-on-game-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/oprewards-com-login_GM431946152.pdfIn PDF document text
    • https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-robux-app-hack_GM431946152.pdfIn PDF document text
    • https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • https://e-learning.man1majalengka.sch.id/__statics/gudangsoal/files/rewards-roblox_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_off00003012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3012 21632 bytes
SHA-256: b338af1d277081cb3f1f144e65ecab1c83f9ca6e6ec4242a275af9b51860efbc
font_01_sfnt_off00005f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7F 19048 bytes
SHA-256: 043331137952d86e457d3600ea8033b41d244ed8296220d2b8f93cd13a79b2aa

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