Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c08b3e90d4faf2…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 09:19:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e338b8b6ccc99e8f9f0befa764f1ddcd SHA-1: 54e51dee6281c0c250c0c64e6213f4bbe446e157 SHA-256: d1c08b3e90d4faf29a4360a839bf4743185d0b73f973a2059df0855dc7210d30
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. 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 primary attack vector appears to be the malicious redirection.

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/free-spins-and-coins-blogspot-coin-master-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-how-to-get-free-skins_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-coolkid-hack-download_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/best-expolists-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/husky-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/dife-ml-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-catch_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-2021-febuary_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/5-sighns-that-u-have-been-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-money-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-mod-robux-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/800-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00003346.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3346 23256 bytes
SHA-256: dba786d16e7a9ada50b51481fb0d01574748c30fea08dc3cba4fc96195ace5e1
font_01_sfnt_off00006795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6795 18636 bytes
SHA-256: 81c706591927eb79e6943da1b13ffaba4e197950c80117a06d94c90a496f3d49

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