Malicious PDF — malware analysis report

Static analysis result for SHA-256 6645c2af4638d6b5…

MALICIOUS

PDF

45.1 KB Created: 2021-05-15 03:07:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eb803d46673b9b2b1da097f2f84edf15 SHA-1: 09694283b79bb5099ebcbae5fa24e9e06a241d03 SHA-256: 6645c2af4638d6b592ac86324a0322b1da6152a3130c79fad614e69a307b4877
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically advertising 'game hacks' and 'free generators'. The document body, though heavily obfuscated, contains references to these lures and the primary malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/406889139/coin-master-rare-cards-hack-game-hack In PDF document text
    • http://stomatolog-choszczno.pl/images/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://stomatolog-choszczno.pl/images/coin-master-hacks-2021_GM406889139.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_off0000496d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x496D 24732 bytes
SHA-256: 50ad166b356c1b37a8b9341ffcc0fdb5115040ab6142d2364c42a5e4a9dbee0c
font_01_sfnt_off00008249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8249 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off00008ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECF 17888 bytes
SHA-256: 3bcd7f88e9aff6a3f00dfa05e6d37dfcb1a17a5992fabfc54377b1f82d15f42c

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