Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a0d101b6942d6f4…

MALICIOUS

PDF

35.2 KB Created: 2021-06-20 03:18:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 081f70bf71d0f85a3c05596fad9a8258 SHA-1: 39e1426e4d93fe75015e64fc7a0dda72f3cfdfb1 SHA-256: 3a0d101b6942d6f42354cf7ed96933c7ee32d796d31a4b7c7dde2b465dff2762
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks or generators. The document body and embedded URLs strongly suggest a lure to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

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.co/app/431946152/comoser-hacker-en-roblox-game-hack In PDF document text
    • http://www.sbairs.com/datas/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/rewards-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-com-today_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-design-it-hack_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-youtube_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_off000033a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A6 22352 bytes
SHA-256: 97b0dbd3dba46f0bf53b3e0a08af879a1ca61e5a266e05ae25090f88acceb532
font_01_sfnt_off000064f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F7 18916 bytes
SHA-256: 8ddc78c00a12c7cd789c7b055dd3ba6787387d3e8e3ee62435fd1cafadf18406

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