Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d8a50deb796512…

MALICIOUS

PDF

33.5 KB Created: 2021-07-03 14:33:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7a626dad72dbde71a14438f99d7491af SHA-1: 154c80980c56ad9808f6bc8cc272a9891b05019f SHA-256: 66d8a50deb7965126d48716ec056effe1e18988f4486d80cfe1ec4d9d61e8425
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector leading to a 'free game hack' lure. The presence of a visual download button further supports a social engineering attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt designed to redirect users to potentially malicious content.

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/479516143/minecraft-clipart-free-game-hack In PDF document text
    • http://www.sbairs.com/datas/files/free-robux-sites-no-verification_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/jailbreak-money-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-hack-2021-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/me-hackearon-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-do-you-get-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/on-roblox-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/freerobuxvbucksexe_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-100-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-minecraft-gift-card_GM479516143.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_off00003048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3048 22096 bytes
SHA-256: a742ae728e41e1c819d3906f7c45c783dd7db176be43f8318e769f4ec4cc4eae
font_01_sfnt_off000060c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C3 18108 bytes
SHA-256: 2474ffc82d65bd1f3a3bcd80ab595ba54cd6162201fea4af08543d46b506f2eb

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