Malicious PDF — malware analysis report

Static analysis result for SHA-256 c316f9269078f0c8…

MALICIOUS

PDF

45.2 KB Created: 2021-05-16 23:56:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fdff5df339f71e1546a33e6aa3eb4a7a SHA-1: a0972b7e62f18741f7c0ae9efecdbdddad54c1df SHA-256: c316f9269078f0c854d0709b4ef7628b2a053ec530fbfb9d9f336d08ee5a3de4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, masquerading as game hacks and generators. The document body and embedded URLs strongly suggest a lure for users seeking in-game advantages, which is a common social engineering tactic. The ML classifier also flagged this PDF as malicious, increasing confidence in the assessment.

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--hack-game-hack In PDF document text
    • http://waldkindergarten-abensberg.de/images/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/get-robux-now_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-robux-android_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004877.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4877 26920 bytes
SHA-256: 1ac310364d537009f756dc2e9c772446c49b01b0c1ca297ef4bbc17b71b0bdcb
font_01_sfnt_off00008619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8619 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCB 17716 bytes
SHA-256: c15a8689411d8cca9ab0759ab4c496fe9b4353d676dd738e300719e9588112ed

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