Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac65efc6c70ef2cd…

MALICIOUS

PDF

35.1 KB Created: 2021-06-30 08:54:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bd6f4e0ba5fc51aa28dc2982516e60e0 SHA-1: 56c165e59809a1fdf318a98b4962b33848c63f96 SHA-256: ac65efc6c70ef2cdf41e167e5f74269c72a719ca69d70944aed38fa6504006d3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The primary redirector URL is http://netcdn.co/app/431946152/free-roblox-accounts-google--game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirection workflow, likely intended to lead users to phishing or malware download sites.

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/free-roblox-accounts-google--game-hack In PDF document text
    • http://rightlead.com.tw/image/data/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/pokemon-go-free-items_GM1094591345.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/atticus129-roblox-profile-hacked-account_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-egghunt-2021-cheat_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/link-hacks-madpaintball-roblox_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/hacks-for-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/robux-free-c_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-free-club_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00003288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3288 22368 bytes
SHA-256: 09711e45cbc9fb839b991a53e1687dba1116dd07d6f70ae87a323d6bf0efc24a
font_01_sfnt_off00006477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6477 18896 bytes
SHA-256: 121768de0ca345301d3ddbf011228385ebe1db0df00a8045f161068021127629

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