Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98bd23c2fe545cb…

MALICIOUS

PDF

33.7 KB Created: 2021-07-21 01:30:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dd2010c07d50cd7191725ff238bc6d74 SHA-1: 10e7b9f1c6db554db79220ccd39a5e24f1099c74 SHA-256: c98bd23c2fe545cb6b855fd48f7b36a82a1f077f19e2f0c2c05e3ace996e220a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and potentially unwanted content, masquerading as a 'game hack' generator. The document body and embedded URLs indicate a lure to trick users into visiting malicious sites, likely for further exploitation or malware delivery. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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.tw/app/431946152/how-to-hack-roblox-accounts-game-hack In PDF document text
    • http://lib.perpuspersada.my.id/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/free-robux-kid-friendly-no-human-verification_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_off00002c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C77 23040 bytes
SHA-256: 3a75457a1c2124357c8f4cfa9ae6dc814c87387ea31ec2f228d7b51403783b8b
font_01_sfnt_off0000600d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600D 18776 bytes
SHA-256: 5ad992e62817d9be0977c850b48097300a9127a969a1336bb79e6086a3cb4c77

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