Malicious PDF — malware analysis report

Static analysis result for SHA-256 920561cc754c98ad…

MALICIOUS

PDF

34.6 KB Created: 2021-07-19 22:11:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b65da40cea13a6b578cbac816f60cbb5 SHA-1: a9b67c1ea0dfad17f47214f8bc976ba58cc1cb25 SHA-256: 920561cc754c98ad0155f64b1840587a516cbe1fd42cb90fe1852ac0e17c15a2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free Robux' and game hacks. The heuristic firings indicate that these links are associated with known malicious redirectors and lure users with deceptive content. While no scripts were extracted, the embedded links and the nature of the lure suggest an attempt to direct users to potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://netcdn.tw/app/431946152/free-robux-without-verification-2021-game-hack In PDF document text
    • http://grugliascogiovani.org/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-tiktok-likes-no-human-verification-or-download_GM835599320.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D39 23140 bytes
SHA-256: a005883d1c217257f6d7e1b079ad94062c1048c483a87e51ed672c3f5a5a8d8d
font_01_sfnt_off00006145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6145 19552 bytes
SHA-256: be33379dc0ddd5bc8799b5fe7f142570c4cba5d50b8da0a44e13e0d2599e722a

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