Malicious PDF — malware analysis report

Static analysis result for SHA-256 78261a4336ac4b83…

MALICIOUS

PDF

43.3 KB Created: 2021-05-21 16:03:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 64327d2bf49519aaeee7e47a9b695ff4 SHA-1: 735578ab76cb080097be78ea29cc3bb2767ab092 SHA-256: 78261a4336ac4b835ce6054d100f8601df175c10a3fa0c32c02738418044d8d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to known malicious infrastructure, specifically promoting "free Robux" and "game hacks". The document body and heuristics confirm a lure to a redirector designed to trick users into downloading or visiting malicious sites. While no scripts were directly extracted, the nature of the links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7947

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/431946152/free-robux-games-on-roblox-game-hack In PDF document text
    • http://fotoflas.gr/images/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fotoflas.gr/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://fotoflas.gr/images/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://fotoflas.gr/images/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://fotoflas.gr/images/how-to-make-a-free-server-in-minecraft-java_GM479516143.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E4 27068 bytes
SHA-256: 7c0cc70345ed04fe213e7bdfedac6a3d84e7a1273ee3e5bf6683cec093bba58b
font_01_sfnt_off00007029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7029 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000079d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D6 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off000086e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E7 18576 bytes
SHA-256: 121d272924a8948b6bfdf19867642727f57edf659587de43eb46571e5003926c

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