Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95b3df40728d0b3…

MALICIOUS

PDF

50.8 KB Created: 2021-06-10 22:56:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ee5496505a145b2f74334055f257ddcf SHA-1: aa8b3ce9d8d6091b84eb670fa7f7238a24910231 SHA-256: a95b3df40728d0b352c4cdd2290f64f92ac752f39deaad98fd7b25ecaaadb232
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious redirector infrastructure. The document body, though partially garbled, contains text related to 'Unlimited Robux Hack 2021' and the malicious URL. This indicates a phishing attempt to lure users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

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.tw/app/431946152/unlimited-robux-hack-2021-game-hack In PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/free-roblox-followers_GM431946152.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/roblox-18_GM431946152.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • https://www.lanumedispa.ie/uploaded_files/userfiles/files/coin-master-hack-apk-free-download_GM406889139.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_004_off000058ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x58AD 27144 bytes
SHA-256: 823a7a92af993a49a5ba8f9a2694bbce6f0a8b049fa3b2b7aa8d9c76330b2d3c
font_01_sfnt_off000095f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95F3 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off0000a002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA002 19568 bytes
SHA-256: e01aaafeaeecb8749aeb80b7b0b248ac98b3d5b7fa1d6af2324588e2dc2f691d

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