Malicious PDF — malware analysis report

Static analysis result for SHA-256 d653ab3b9f14f1f2…

MALICIOUS

PDF

49.2 KB Created: 2021-06-09 12:00:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9686760f88d379190846fabbdb9185a4 SHA-1: 304a5a4bd7fc56f34415e65aa670199199d37894 SHA-256: d653ab3b9f14f1f2c3a55e57a74a9ea019683651150ac48f696454a901a3ef21
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs and a visual call-to-action, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious. The presence of external URIs and the overall suspicious nature of the content indicate a likely attempt to trick users into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/free-roblox-sweatshirt-game-hack In PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/robloxhacks_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/bot-that-buys-any-free-item-instantly-roblox_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/roblox-escape-room-cheats_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000550d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x550D 25608 bytes
SHA-256: 45155fd8fe44237b73c9fd33d0d23ddbc634d6ddce8820bac36021b06769bb1f
font_01_sfnt_off000090be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90BE 3512 bytes
SHA-256: d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f
font_02_sfnt_off00009c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C51 18732 bytes
SHA-256: 58b15099f58af306342a2b94ca9eac721d657f659e57b07f74ce4781dd74d451

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