Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a44a1dfd820a41…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 05:23:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0e9f4e623fb1e68b9c559840dfd7ba21 SHA-1: 437b21be6807d45a8c4c84963d05f92681a7405c SHA-256: 84a44a1dfd820a41c82d92cd943c5c44be3af01b48ef94194f40d34a3d828e6a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, with one prominent link leading to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for game cheats or hacks, suggesting a phishing or scam attempt. While no scripts were directly extracted, the presence of embedded links and the nature of the lure strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-cheats-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/tiktok-free-crunchyroll_GM835599320.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/robux-redeem_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-ios-app_GM406889139.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_004_off00004f49.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F49 25360 bytes
SHA-256: 3a0dd7a419b9b492832faa1b2143a4273028fd06ae0c82354b5a56282e6ca250
font_01_sfnt_off000088aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AA 17712 bytes
SHA-256: 0cf37999a32b0b26e6dcf722a916a3c4a254350d50e55584564eaaa0ec63890c

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