Malicious PDF — malware analysis report

Static analysis result for SHA-256 5523149208888af0…

MALICIOUS

PDF

41.0 KB Created: 2021-05-21 00:50:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bb3a7450a8576f91b4a94dfeb1573701 SHA-1: bf92129fdc2171cd695212ddf591f17cd52fc19c SHA-256: 5523149208888af03a1de86fdf4ff2e6d6f3a9ca144b474e37ba9345f76b2938
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a known malicious infrastructure, specifically advertising 'free Robux' or 'game hacks'. The document body, though partially corrupted, contains similar lures and a call to action to download a generator. The embedded URLs suggest a phishing or scam attempt designed to trick users into downloading further malware or engaging in fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7445

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/free-robux-games-that-actually-work-game-hack In PDF document text
    • http://deyuan-pc.com.tw/images/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35C4 25592 bytes
SHA-256: 0d18bef29adc76e4e77ae31dca70e9ee51181a58a36901b6d946867b213f61e9
font_01_sfnt_off000070e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E7 3124 bytes
SHA-256: 4766431bc5e5dac0b4a80db608bd31b708780068e1a6045edcb072880cc7a0ea
font_02_sfnt_off00007bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBD 19392 bytes
SHA-256: 2bd118a57b53ff37cab680797aee460eb59fed046ceba4ed0277135d7eae5baa

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