Malicious PDF — malware analysis report

Static analysis result for SHA-256 a18a16155887f984…

MALICIOUS

PDF

36.7 KB Created: 2021-05-22 06:34:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d014ada0c20e6a9fc145f270023af4fb SHA-1: 6008273f6b9cd39f679944348ce47c9fe2aea52f SHA-256: a18a16155887f98475118f4b1d1052386e67abd32b064d8e0c7d130faa48d49f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure related to game hacks and free currency to entice users. It contains multiple embedded URLs, with a primary one pointing to a known malicious redirector infrastructure. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9365

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-spin-and-coin-game-hack In PDF document text
    • http://d-cision.nl/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://d-cision.nl/images/robux-codes_GM431946152.pdfIn PDF document text
    • http://d-cision.nl/images/robux-sign_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000035cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35CB 24656 bytes
SHA-256: caad69bbd27b9117d90d54692753a082fc996a35b907d5ea8884d69578e294e2
font_01_sfnt_off00006e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E65 18060 bytes
SHA-256: 7f8980b6f3213b204c7b050e62c653166806b65682437d624869b2fc7a4cb6a7

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