Malicious PDF — malware analysis report

Static analysis result for SHA-256 d79787489e80ec60…

MALICIOUS

PDF

42.8 KB Created: 2021-05-15 23:40:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 66424a85c98d58785b2153966696853e SHA-1: 8c65e52ff550739249b7917387de3b024b618c52 SHA-256: d79787489e80ec605aa46b68b4e3c81ec70104a600d10036a733487173a04517
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free Robux and game hacks. The heuristic firings indicate that the document is designed to redirect users to potentially harmful content. Although no scripts were extracted, the embedded links and the nature of the lures strongly suggest a phishing or malware distribution attempt.

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/431946152/free-robux-without-human-verification-real-game-hack In PDF document text
    • http://viemeo.fr/images/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://viemeo.fr/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://viemeo.fr/images/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://viemeo.fr/images/coin-master-free-spin-no-offers_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_off00004737.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4737 25584 bytes
SHA-256: c66fadcb21f9beea731b0e7acdc2e948b4e1b9c02096ff38e9c027f034c0bb9d
font_01_sfnt_off00008234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8234 19296 bytes
SHA-256: fcd37aae12381262441149b3f055c838aea0a99c045645b338d4096dcdd54a9c

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