Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9667aace36e84f…

MALICIOUS

PDF

42.8 KB Created: 2021-05-15 10:00:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6726b5b43dcc9ad96fe08f9b398f0668 SHA-1: fecead9ba8654929976e80135c7fb5fbbbe3cbfb SHA-256: fd9667aace36e84f012a320fcd2f4135842a7307d686333e13e3e7f976b699a9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and free generators. The document body and extracted URLs strongly suggest a phishing or scam attempt, likely leading to further malware downloads or credential harvesting. The ML classifier also flagged this PDF with high confidence.

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/how-to-get-minecraft-windows-10-for-free-with-java-game-hack In PDF document text
    • http://yardfon.go.th/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://yardfon.go.th/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://yardfon.go.th/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://yardfon.go.th/images/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://yardfon.go.th/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://yardfon.go.th/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://yardfon.go.th/images/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://yardfon.go.th/images/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • http://yardfon.go.th/images/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://yardfon.go.th/images/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://yardfon.go.th/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://yardfon.go.th/images/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://yardfon.go.th/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://yardfon.go.th/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://yardfon.go.th/images/robux-apk_GM431946152.pdfIn PDF document text
    • http://yardfon.go.th/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://yardfon.go.th/images/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://yardfon.go.th/images/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://yardfon.go.th/images/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://yardfon.go.th/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.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_off00004930.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4930 25440 bytes
SHA-256: f42419a4b9193d2ec459e63fdc313423b85abde55c9d04aecf0eaefa6e39d57c
font_01_sfnt_off00008316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8316 18972 bytes
SHA-256: 8e658ed9ffe7233ae998901bc6eec399b36e43f77efcaafe704fa409c54d4733

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