Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b80d588702f15ca…

MALICIOUS

PDF

39.3 KB Created: 2021-05-22 08:26:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cd8ed52b33a734784b7f69f23fe17aa8 SHA-1: 8e78724c2711c13fd103075d47055f61ce934919 SHA-256: 5b80d588702f15caa4f75161fd40d3eb29099c133d35182389d63b8d2b14cdfe
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 lures users with promises of game hacks and free generators, indicating a phishing or scam attempt. The ML classifier also flagged the document as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-daily-free-spins-link-today-game-hack In PDF document text
    • http://kids-academy.pl/images/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://kids-academy.pl/images/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://kids-academy.pl/images/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://kids-academy.pl/images/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • http://kids-academy.pl/images/hacks-to-get-free-robux_GM431946152.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_002_off000034c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34C6 25412 bytes
SHA-256: 0f291d48e2572ee10be39de9dc929738068bf38b6a928464377020af7fb5416f
font_01_sfnt_off00006d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D70 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00007712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7712 18652 bytes
SHA-256: b7acebacf47409c7f0f2932ba41e4c1dc120b4ef5280387cf9333091bd47b2e0

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