Malicious PDF — malware analysis report

Static analysis result for SHA-256 62faf9c3a1c309e5…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 00:13:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3c3ea4d3d5c08ebfffc782fe5b11d317 SHA-1: d89b17e27fe1fec7f1f2b30d78ba17948787da6f SHA-256: 62faf9c3a1c309e567019285e36118d20d24e90b9beae71372ef47f2067967c7
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 game hacks and generators. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a download button lure suggests an attempt to trick the user into navigating to malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/daily-spin-game-hack In PDF document text
    • https://de-licht.com/image/data/files/generator-free-robux_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-roblox-script-injector-2021_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/getrobux-now_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-codes-for-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/c7-roblox-hack_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://de-licht.com/image/data/files/free-robux-mr-robux_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/get-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://de-licht.com/image/data/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://de-licht.com/image/data/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • https://de-licht.com/image/data/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://de-licht.com/image/data/files/robux-hack-without-installing-apps_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
font_00_sfnt_off00003123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3123 22288 bytes
SHA-256: 942d6c79fb0e36769e8d9f15be78e0f4a2954f9afd83b5d06adc0c97144d9bd5
font_01_sfnt_off00006296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6296 18188 bytes
SHA-256: 8f467c2aab41e5b850459f86ff5bbfe96947df836eedba9d28b4382ba6a52135

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