Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b387797dec0cf1…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 07:32:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5b50b088844a1653e876dd43eb0d5ca1 SHA-1: 7c7df68db9d9d878ab1fe7c11fbef4c93c47b24f SHA-256: 88b387797dec0cf1b24540d67d752aacf186d86c38879ae0ac2aabfeae273a31
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. These links likely lead to a second-stage download or exploit. The ML classifier also strongly indicated maliciousness. The document body and embedded URLs suggest a social engineering tactic to trick users into downloading further malicious content.

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/406889139/free-pet-treats-coin-master-game-hack In PDF document text
    • http://dshikr.ru/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://dshikr.ru/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://dshikr.ru/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/worst-client_GM479516143.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://dshikr.ru/images/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/universal-minecraft-converter-free_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_off000048f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F2 25836 bytes
SHA-256: b239f57431dadb0d5925d5a666a092566687144ba05ee8f8613d782df25f4a10
font_01_sfnt_off0000849e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x849E 17864 bytes
SHA-256: 276a5511e926ade4da3bb644615f667fa3bbb56bd99d2adc923a65479c9a9e34

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