Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7a84bab4e351b0…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 07:08:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fa500e0e7db1c982f3e18e7dc675397e SHA-1: 56da9a349a73acb8092e8f746b8cb978c7243001 SHA-256: fd7a84bab4e351b05e3eb28a4d199800108369c43e4d074da2c584062efca362
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting game hacks and free item generators. The document body, though partially corrupted, contains references to these lures and the primary malicious URL. The presence of these links and the heuristic firings strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/will-minecraft-ever-be-free-game-hack In PDF document text
    • https://www.donjastubica.hr/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/wurst-18_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-hack-here_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_003_off000049fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FE 25136 bytes
SHA-256: 0834c498e3794a9cf47c61bcf1f721de6f24247c5d20d535007267086e54dc01
font_01_sfnt_off0000836f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836F 18168 bytes
SHA-256: 211f984956e508daade61d8eb22376d96f7c6cd7f6bdb04149b2d856b5b09752

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