Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d692052918af92…

MALICIOUS

PDF

45.4 KB Created: 2021-05-13 03:03:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c7e955dd4c8397c247a7d2a507da2cdc SHA-1: 356a21427dc5c18191fc1813eb06154d80fb2985 SHA-256: d4d692052918af9238d77ee745c1b07cbff6d0b4827b0e8ba9b2e6ee4351b33b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically targeting users with lures related to game hacks and free items. The presence of a visual download button and the ML classifier's high confidence score further support the malicious nature of this document. The document's primary function appears to be directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/431946152/roblox-demon-game-hack In PDF document text
    • http://www.salwangurgaon.com/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/roblox-images_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/minecraft-gun-games-free_GM479516143.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
font_00_sfnt_off00004584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4584 26572 bytes
SHA-256: 1b463a4c39c4a6d193aaa77b70046d15e90bdeca4b65c356b94a519cf37070ba
font_01_sfnt_off0000823b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x823B 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00008f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4C 18212 bytes
SHA-256: 154e8108477d046bb889977307a11af941b4a6aa2dcdd37083d059027e482bf2

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