Malicious PDF — malware analysis report

Static analysis result for SHA-256 093fe88ddd9c1778…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 00:04:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5541672a4c1dd63864c3ce76d1165f76 SHA-1: 09a479e10073d2efb2cf8efdae9aa239ad244a51 SHA-256: 093fe88ddd9c17781d59b153681864b8bb5b0a1d1ca5da9b15de4efde694c9df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple embedded URLs, including one identified as a malicious redirector infrastructure. The document body and heuristics suggest a lure for free game currency or hacks, which is a common social engineering tactic. The primary malicious URL identified is http://netcdn.co/app/431946152/is-there-an-actual-way-to-get-robux-for-free-game-hack, which likely leads to a further malicious download or phishing page.

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/is-there-an-actual-way-to-get-robux-for-free-game-hack In PDF document text
    • http://www.jsvillas.com.tw/assets/files/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/hack-roblox-online-no-survey_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/bradski-free-robux_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-get-tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/robux-game_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-2021-how-to-cheat-in-fencing_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-synapses-roblox_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E6 22956 bytes
SHA-256: f36ac4da3670ff56512c514dd86206ebed2b0ed2f32ab157d8eb05d2cb236e39
font_01_sfnt_off00006483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6483 19436 bytes
SHA-256: edeb17a4360ee20e6a2452849c02cd973fda4a26a0c37ea8753343d2d0bc5dd3

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