Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90f4eacfa730575…

MALICIOUS

PDF

45.8 KB Created: 2021-05-19 11:57:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2a02ccc91ac882db645c11893cde5b9c SHA-1: e4428f4e1d0b2c5bca57a3fb663432c7481b3076 SHA-256: a90f4eacfa730575ba4864e4c6a26f5776a2076bbc55e679ddecbee965ac29b3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-link-game-hack. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-daily-free-spins-link-game-hack In PDF document text
    • http://www.beantownlimo.com/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.beantownlimo.com/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://www.beantownlimo.com/images/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://www.beantownlimo.com/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.beantownlimo.com/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.beantownlimo.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.beantownlimo.com/images/minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.beantownlimo.com/images/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.beantownlimo.com/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.beantownlimo.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.beantownlimo.com/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.beantownlimo.com/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://www.beantownlimo.com/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.beantownlimo.com/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.beantownlimo.com/images/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.beantownlimo.com/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://www.beantownlimo.com/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.beantownlimo.com/images/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://www.beantownlimo.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.beantownlimo.com/images/give-free-robux_GM431946152.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_003_off000049a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A3 26636 bytes
SHA-256: f02ea9182a09527e01d59e53c89a27c4114e95eeafe2ab62824b4bf038bffecb
font_01_sfnt_off00008669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8669 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off0000900a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x900A 18476 bytes
SHA-256: dd1e9edcae6782c480dff53724a1580fadec54e6656b8ddfb273bcd699f2c343

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