Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3491389ffb3904…

MALICIOUS

PDF

43.2 KB Created: 2021-05-20 04:20:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 71a71a5989e18698463f06255488d5ca SHA-1: 74384a548af7635b92dfe727388b61e8f0cedc4a SHA-256: cd3491389ffb39040f423938366bc8bbf24ddb85a43c0b80e7efc4a80199fa5e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free spins' lures. The document body, though partially corrupted, contains a prominent URL matching the heuristic findings. The presence of embedded URLs and the ML classifier's strong positive signal indicate a high likelihood of malicious intent, likely to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/406889139/coin-master-daily-free-spins-link-today-game-hack In PDF document text
    • http://uristdona.ru/images/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://uristdona.ru/images/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://uristdona.ru/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/roblox-g_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://uristdona.ru/images/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/best-free-minecraft-server-hosting_GM479516143.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_off000049fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FA 26076 bytes
SHA-256: 43a1e1dcdb621e664a82da3fe6558d9a604a6c4fcf925e36e98b538d34e4876f
font_01_sfnt_off00008537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8537 18652 bytes
SHA-256: b7acebacf47409c7f0f2932ba41e4c1dc120b4ef5280387cf9333091bd47b2e0