Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac9cb50cb56b6084…

MALICIOUS

PDF

40.9 KB Created: 2021-05-22 23:52:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c1ad181aede1b8c75c8fba6cf629a6b6 SHA-1: 9bee0f999f61b58aaddffc6883f2c569a98b65dc SHA-256: ac9cb50cb56b6084b8dc7cc0f9700c1822e4c515fa161f08f00ae0ae005f2c6f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, disguised as 'free generator' or 'game hack' lures. The document body and heuristics indicate a social engineering attempt to trick users into clicking these links, likely leading to further malware downloads or phishing pages. No scripts were extracted, but the presence of malicious redirectors is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7499

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/free-minecraft-accounts-2021-game-hack In PDF document text
    • https://elman1td.sam73cyber.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://elman1td.sam73cyber.com/__statics/gudangsoal/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://elman1td.sam73cyber.com/__statics/gudangsoal/files/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • https://elman1td.sam73cyber.com/__statics/gudangsoal/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://elman1td.sam73cyber.com/__statics/gudangsoal/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32EF 29524 bytes
SHA-256: 7fc14feeaada345296a19473a342c391bfa54706a63b29d3691aa158bff208a6
font_01_sfnt_off000074a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A1 2856 bytes
SHA-256: 8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44
font_02_sfnt_off00007e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E77 18252 bytes
SHA-256: a7a52ec6c2bb565f332a4905da6a686ee34bc05df98df468ad89fd298f001152

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