Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bff484fd55b508a…

MALICIOUS

PDF

33.7 KB Created: 2021-07-06 12:42:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: eaf5cd68c22efe7c163fdab90eeb5f3e SHA-1: d8c60f28ed4192c959dc141ebf839089a5b92228 SHA-256: 3bff484fd55b508ab61bf5ff5e8079f81559c942806ae917fa4fb7e81c999bfe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious domain, likely serving as a lure for users seeking free in-game currency or hacks. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

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/431946152/free-robux-gift-card-game-hack In PDF document text
    • https://asiavisiontreks.com/userfiles/files/flame-gg-free-robux-https-flame-gg-zeph_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/get-free-robux-no-survey-no-download_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/coin-master-free-online_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/how-to-hack-a-players-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/worked-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/roblox-without-logging-in-free_GM431946152.pdfIn PDF document text
    • https://asiavisiontreks.com/userfiles/files/minecraft-fly-hack_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_off00002d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7B 21988 bytes
SHA-256: cf64b01b3676304a190a41818c94a499962a3554bb8f34d15592cb3aa2cc5ec8
font_01_sfnt_off00005e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E29 19112 bytes
SHA-256: 5d60391c622a458b14b8fa69ffb952c1d3cbb56e74fa158a34f16b9612198a82

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