Malicious PDF — malware analysis report

Static analysis result for SHA-256 55773d01e5e64f88…

MALICIOUS

PDF

38.2 KB Created: 2021-05-24 02:36:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7a93033cd62da5c3e5815aaa2c46f789 SHA-1: 5009c69c0046a38a39026ea2e8c9a7edcd195bf4 SHA-256: 55773d01e5e64f88eb54a7ed50c6b4a18a56571a817739b180b6b20907d134fc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering 'free generators' or 'hacks' for popular games, which is a common lure for malware distribution or phishing. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were directly extracted, the document body and embedded URLs suggest a workflow designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/835599320/free-followers-on-tiktok-game-hack PDF link annotation
    • https://info-zentr.ru:443/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://info-zentr.ru:443/images/coin-spin_GM406889139.pdfIn PDF document text
    • https://info-zentr.ru:443/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • https://info-zentr.ru:443/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://info-zentr.ru:443/images/free-robux-no-verification-needed_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_002_off0000321b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x321B 24732 bytes
SHA-256: 82e5db772443c0a52721223c16a78bad85bc8f43fc25ba08b347fb345c051eef
font_01_sfnt_off00006b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B88 2892 bytes
SHA-256: 5e0712ca08337fb3b2e5736ec787a8b2ab1b9b6f3706f0b029d23afe08e6a7a6
font_02_sfnt_off0000756e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756E 17692 bytes
SHA-256: 03131e98da2a54a1a72f5b4aa345640c80e569685032efd5f04fb63d3df01f9e

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