Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceaac2055fa1d3a8…

MALICIOUS

PDF

44.3 KB Created: 2021-05-17 05:23:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b27d4675e67a3ebfd674647eab6646e3 SHA-1: 7a53f724072fdbbdcf5bf89a8aa0e084d366b31e SHA-256: ceaac2055fa1d3a8a68e3f83d792e2541bdb9ea696e16bb71e9aadc82989113f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links and a primary redirector URL that are associated with game hack and free spin scams. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the document's structure and embedded links strongly suggest a lure to a malicious website, likely for ad fraud or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-spins-link-facebook-page-game-hack In PDF document text
    • https://www.contabilidadesomma.com.br/images/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.contabilidadesomma.com.br/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49F2 23564 bytes
SHA-256: a47569d27de0512f1c8b27eebc47376cab373d32021e2dd8206390b2318f63db
font_01_sfnt_off00007f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6A 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8954 18656 bytes
SHA-256: 56fd455a4e74d684af59d29ece8fb42f6cec19ee4836a34a997115c3c0d135ca

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