Malicious PDF — malware analysis report

Static analysis result for SHA-256 0552bb47182e41d6…

MALICIOUS

PDF

34.3 KB Created: 2021-07-19 20:59:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0db718e317e4b6116767632c533c569f SHA-1: 3b6315c699476c4dfdaef458ce3665b10e4b8b37 SHA-256: 0552bb47182e41d6602f0c38c3de5dc9e05e62a6952da3f18bc80a90526b794d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure for game-related cheats and currency, directing users to a redirector URL that is associated with malicious activity. The document contains multiple embedded URLs that point to domains known for hosting similar scam content. The ML classifier also flagged this PDF with high confidence, indicating malicious intent.

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/406889139/coin-master-free-spins-link-today-game-hack In PDF document text
    • http://museumkk.ru/images/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://museumkk.ru/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://museumkk.ru/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://museumkk.ru/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://museumkk.ru/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://museumkk.ru/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://museumkk.ru/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://museumkk.ru/images/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://museumkk.ru/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://museumkk.ru/images/free-robux-generator-no-human-verification-2021_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_002_off00002ddc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DDC 23652 bytes
SHA-256: a8f180bd28ded2117d24b284e0cae5d4c0f99d128f3e89eed998f5284d816fd1
font_01_sfnt_off000063a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A1 18412 bytes
SHA-256: ee277532c3187caf3da016130e4cbd3fee848ac0b1174d0f40fc16c12ed3c41d

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