Malicious PDF — malware analysis report

Static analysis result for SHA-256 7795bc7ef43644ad…

MALICIOUS

PDF

44.9 KB Created: 2021-05-19 07:02:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eb91167a96a5994b88ef5617b52dfcee SHA-1: c12f7b528845eb618ae4084b02d077f5a5d8f786 SHA-256: 7795bc7ef43644ad398126195dee8b4d7031e4de80dd6f02a4e99bb06ade5dce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious link disguised as a game hack generator, designed to lure users into downloading a payload. The link points to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/1094591345/pokemon-go-free-gucci-game-hack In PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/get-robux-today_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-18_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/robux-2021_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ad5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AD5 24152 bytes
SHA-256: 6d00a4d02c152bff58da3bb62aae241deea7917652aaedbf6e96ebde6a7e02ff
font_01_sfnt_off000081d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D2 3436 bytes
SHA-256: 97acb3dfe99d8aca5d6f8db8393b488ed98b2263432579da10c481344d87daf1
font_02_sfnt_off00008dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEA 18104 bytes
SHA-256: a5a1789f0090c479ab8b0e309775ce9018bfe2cc7200607efaaa5d3b0ff7d581

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