Malicious PDF — malware analysis report

Static analysis result for SHA-256 d418527d48825a2f…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 12:31:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3db67b1a0a1bbce3056298444f2b4cc6 SHA-1: 72146a8304a27c2231a0452a6fe568cde24163ca SHA-256: d418527d48825a2f99efacd194942acc5246d2879b448794c05794d9123c9238
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency generators. The heuristic firings indicate these links are part of a known malicious redirector chain. While no scripts were explicitly extracted, the nature of the lures and the embedded URLs strongly suggest an attempt to drive users to potentially malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-coins-2021-game-hack In PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-domnius-roblox_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/robux-color-glitch-hack_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-to-hack-roblox-games-downloads_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/hack-stats-on-roblox-game_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/roblox-verification_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/wwwrobux-cheat-us-umlited_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/hats-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/hacker-names-roblox_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/how-to-get-free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.owlweb.co.uk/uploads/files/files/free-doumins-to-wear-out-of-game-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5A 22792 bytes
SHA-256: a7a7f137d4f9ac2237f0faed47451ea2e33af1e72f794ce0d29ef5487a9f146f
font_01_sfnt_off00006248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6248 18400 bytes
SHA-256: 0cc69a54ece3ed14f72d45612a229cad946be49a09675100e3633ee455bac280

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