Malicious PDF — malware analysis report

Static analysis result for SHA-256 05351c0a18e63dde…

MALICIOUS

PDF

45.6 KB Created: 2021-05-19 17:18:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 99c3aea36e56e37f0252d655389d4b87 SHA-1: ddfd7411c19caab1a8a63c33be3de27e430391c7 SHA-256: 05351c0a18e63dde054e35590c9a797bd41a447e4ec3fd3469487a10caa90168
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The document body and extracted URLs suggest a scam aimed at tricking users into visiting potentially harmful websites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/1330123889/pubg-uc-rate-in-pakistan-game-hack In PDF document text
    • http://armportal.co.uk/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://armportal.co.uk/images/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://armportal.co.uk/images/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://armportal.co.uk/images/how-to-download-minecraft-for-free-on-your-phone_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
stream_003_off0000490a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x490A 26852 bytes
SHA-256: 3d1ed97f6676fd5ba07634440a2378f9c9ad0b2e83b58150428336257f8f2666
font_01_sfnt_off0000852d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852D 2816 bytes
SHA-256: 214f0b8c2b3c279476f862ae08d7e072944da5f6084cbd6130f0ffdc3460b614
font_02_sfnt_off00008ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED8 18520 bytes
SHA-256: 62ca9f776cc86b443e9e9d4a710821a7289ea55283ce8d8229f110cfc2488a71

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