Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c730a6f1c664f82…

MALICIOUS

PDF

42.2 KB Created: 2021-05-19 01:11:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cbcde50b18e4070814513f93c462b7ab SHA-1: a35297bf0324c52c5a3732f72eee102405e1bcfa SHA-256: 3c730a6f1c664f826f15049524f1ab36e924438c4f3089dd050afedb873274f4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that point to known malicious redirectors, specifically targeting users with lures related to game hacks and free in-game currency. The ML classifier also strongly indicated maliciousness. The document body and embedded URLs suggest a social engineering tactic to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-spin-gratis-coin-master-game-hack In PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/master-coins-free_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a0e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0E 25408 bytes
SHA-256: 8d67895ea7bcdf2ab382cf855f57f035daae5406d657903507be16a1ebf9b221
font_01_sfnt_off000083ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CE 17884 bytes
SHA-256: 23dcadeb48e0d526df43250cfc669ee55e9a856b7439bddbcf6542ec0d6b5e03

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