Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8baaac7dc53fcf…

MALICIOUS

PDF

35.4 KB Created: 2021-05-22 11:09:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5940aaa23ab7a50c5e05ad6f11768e98 SHA-1: bc1a493e7e2c8b47f7f86654bea17f1b2afb44fb SHA-256: da8baaac7dc53fcf114ac8eb583f6795888a4d969016e35dbaf492ee8eb87181
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as free game hacks or generators. The document body and heuristics indicate a lure to download or access further malicious content, likely leading to exploitation or further payload delivery. The ML classifier also strongly flagged this PDF as malicious.

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/479516143/create-minecraft-server-free-game-hack In PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • https://knowledgekingdom.com.jo/aidata/blanc/files/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In 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_off000032ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32AB 24484 bytes
SHA-256: 7d87084f477a2a6b69c6495fb95e35e07c7bfc5c8d0ce14844eaa825cf218018
font_01_sfnt_off00006ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB0 17684 bytes
SHA-256: 739dfd09c5bedc98bb46a6c5718dfc06afa6391c84dc1b066bb71172f329b46c

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