Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1244a66192077cd…

MALICIOUS

PDF

44.6 KB Created: 2021-05-16 03:12:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 00e1e2e1ddf8c52884f6d40b0647f511 SHA-1: 00483d46b3882a1fe748c5f41091402d03fdf65d SHA-256: d1244a66192077cdb8604f6f98be112ab852a18e31ef08c64738abf004a686e6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and free generators. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains references to the malicious URLs, suggesting an attempt to lure users to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/what-is-wurst-game-hack In PDF document text
    • http://medinup.pt/images/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/robux-earner_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-do-you-get-free-robux-on-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ab3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB3 24976 bytes
SHA-256: 4617b9892c75573d2864a67e0248b7767996ce3e1e476965f8bb0993f0d823b3
font_01_sfnt_off0000836b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836B 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00008d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0A 17952 bytes
SHA-256: 68b7317228aea096fce823b84819f53df56dc0eee70fa2894e05b7ec7d9599c6

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