Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3a6945c2f73319…

MALICIOUS

PDF

42.8 KB Created: 2021-05-12 16:31:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7aa901d438a9a41358cf53bb6f4031dd SHA-1: e3fee2b09058bcf7b025d967014a19b12f631807 SHA-256: 0a3a6945c2f7331901b869da6ee97bde0346615ff3330ecff887cc0b3a7001d7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a lure for game hacks, directing users to a known malicious redirector. The ML classifier strongly indicates maliciousness. The embedded URL is the primary indicator of compromise, likely leading to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/minecraft-mod-menu-apk-game-hack In PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/hacker-coin-master_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In PDF document text
    • http://www.freenom.comHeyIn 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
stream_003_off000049bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49BC 25904 bytes
SHA-256: 2255c93787db98e3b18259d2392ee1c025fdd06a37df250432bae8336db2672f
font_01_sfnt_off000084d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D6 18372 bytes
SHA-256: dd56030cd3d2a3e70d7932d5191cbad959afee4333ac7fd4180e1cf7291cf5ff

Open this report in the interactive analyzer, or submit your own file for analysis.