Malicious PDF — malware analysis report

Static analysis result for SHA-256 fddf1f8ac441b3a9…

MALICIOUS

PDF

39.7 KB Created: 2021-05-22 11:35:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5ff7da27bb9d512f9e9bb139ebd7604c SHA-1: 5a5575f03ec53a73685e25cbbf085f61e91e6f32 SHA-256: fddf1f8ac441b3a9235c510cbf9e70d30c338c37d881bf5775e1d750ff4aa7c3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free spins' to lure victims. The document body and heuristics confirm the intent to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirection workflow, likely leading to further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-free-spins-and-coins-blogspot-game-hack In PDF document text
    • http://umksn.pl/images/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://umksn.pl/images/coin-master-free-spins-link-no-verification-2021_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000035fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35FA 24680 bytes
SHA-256: e7beb4d58c11f6ffbeb7a1c20760b59e367f1612167df8c41dbee087b4948a0c
font_01_sfnt_off00006eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB8 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off0000789e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789E 18636 bytes
SHA-256: 0f54115b9972647639797d248389657ce322f7c5c12f639c73d71ff235a73201

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