Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8d4b76a5e5d896c…

MALICIOUS

PDF

46.2 KB Created: 2021-05-16 16:30:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d71632c284ef3873b8fbbf8519221175 SHA-1: 51f3946ed176cfc8dc162ac3bcc85a5fe0694322 SHA-256: f8d4b76a5e5d896c9137a5258b76ab85ce599229563356a1fa085e64a5d2502c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game-related lures, such as 'free spins' and 'game hacks'. The document body and embedded URLs suggest an attempt to trick users into visiting malicious sites, likely for distributing further malware or engaging in phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/how-to-get-free-spins-grom-coin-master-game-hack In PDF document text
    • http://precisionheavyhaul.com/images/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-today_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/get-more-robux_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/wurst-client_GM479516143.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://precisionheavyhaul.com/images/hacks-to-get-free-robux_GM431946152.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_off00004b03.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B03 25688 bytes
SHA-256: 9599b0886aae9004474ec05990e2ba8e3ecf7d7ed697a124c76f58343b8a644a
font_01_sfnt_off0000865a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865A 3380 bytes
SHA-256: 1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57
font_02_sfnt_off00009242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9242 18308 bytes
SHA-256: 54bc4cb339ab54a414e81dbc8c78cd983f23e840174d14985084a71892f993b4

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