Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3437e42e6b8c3ca…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 08:52:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ba5cd01f1443082b761eecf96d7f8f37 SHA-1: 30dae27ddaff529aac3ffe3e9ee41fa5a6a0f9cc SHA-256: c3437e42e6b8c3caa104759b013511e23db8d318786002213e56cd50da824e79
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-free-spins-apk-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-apk-game-hack In PDF document text
    • http://samavetpharm.com/userfiles/files/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/pubg-2021-uc-glitch_GM1330123889.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-only-pc_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/for-roblox-launch-for-free-vip_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/black-magic-roblox-hack_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-make-a-cool-free-roblox-acount_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/giftrobux-com-generator_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003163.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3163 23296 bytes
SHA-256: f0fa0071fa3ccc3f08778c7a3750311b61e23b44b991a87371eb50d0276ab9ef
font_01_sfnt_off0000660c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660C 18344 bytes
SHA-256: 1dbe0fcba05c02502e584b0e7ffab6a4f048fc487afe950fa18a3df4b6395c6f

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