Malicious PDF — malware analysis report

Static analysis result for SHA-256 526812e3d04ed3e0…

MALICIOUS

PDF

44.1 KB Created: 2021-05-15 08:04:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 11fbf6c3653a02b0535c2f9f8dfe0185 SHA-1: d7346a3d90c0310fedfbc973feccc8cf2f86234b SHA-256: 526812e3d04ed3e0939d3db5b75b460ddc8d8a94e73c95f4f9725cb100af8773
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to deceive users into visiting potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/free-minecraft-java-account-game-hack In PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/robux-earner_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/roblox-free-items_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://griyafirdaus.com/ckfinder/userfiles/files/free-robux-generator-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_003_off00005045.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5045 25752 bytes
SHA-256: 247be1c55987b2099cebd4803e0e677d8bf64d307eb33daeaf898951ce2fa5e6
font_01_sfnt_off00008ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD1 18128 bytes
SHA-256: ad2a0848393495eee102bd1b36be1bc15cd9afc8a8e02692ab65cad6db8d4212

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