Malicious PDF — malware analysis report

Static analysis result for SHA-256 45b3f7f4b4ca13b3…

MALICIOUS

PDF

48.1 KB Created: 2021-05-17 13:01:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d77b7865ac0188ded7c790def24a33f3 SHA-1: 77fd26ccf737e9fa7344d4872fbe3bdb1d1ecf01 SHA-256: 45b3f7f4b4ca13b3fe2d43e271f04e1a2bdef950cedc9b3007223aafb4995008
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that point to known malicious redirectors, disguised as "free generator / game hack" lures. The ML classifier also flagged this PDF as malicious. The embedded links likely serve to download and execute further malicious payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/431946152/how-to-get-free-robux-fast-and-easy-game-hack In PDF document text
    • https://uofk.edu/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/roblox-character-free_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/robuxmatchcon_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://uofk.edu/images/minecraft-pe_GM479516143.pdfIn PDF document text
    • https://uofk.edu/images/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://uofk.edu/images/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • https://uofk.edu/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • https://uofk.edu/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://uofk.edu/images/get-coin-master-spins-free_GM406889139.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_003_off000049f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F8 28928 bytes
SHA-256: 5fe3085619950fa82f51b634b0ec40a954c3747375fe08d1487cd5671a39149c
font_01_sfnt_off00008b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0D 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000097b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97B4 18864 bytes
SHA-256: 264ac3d9ee16189788a918c90b00fec891485e046f110455159a23ab28eb8c09

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