Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b7c9f431191b52…

MALICIOUS

PDF

48.6 KB Created: 2021-06-11 04:05:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5c9e31088110439e4e4f09311a62c2b0 SHA-1: 0a9d0655a8b2847adefb30267ce04ea63a621958 SHA-256: 86b7c9f431191b52f90db330086c8e085b9d8e3fbc94f60390b156202e261e0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and generators. The primary link directs to a URL associated with a 'free generator' for Roblox, which is a common lure for malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/code-for-roblox-hack-generator-game-hack In PDF document text
    • http://brandyourbody.com/images/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://brandyourbody.com/images/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://brandyourbody.com/images/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://brandyourbody.com/images/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://brandyourbody.com/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://brandyourbody.com/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://brandyourbody.com/images/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://brandyourbody.com/images/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://brandyourbody.com/images/how-to-get-free-robux-joshy_GM431946152.pdfIn PDF document text
    • http://brandyourbody.com/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://brandyourbody.com/images/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://brandyourbody.com/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://brandyourbody.com/images/pubg-uc-kharidna-hai_GM1330123889.pdfIn PDF document text
    • http://brandyourbody.com/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://brandyourbody.com/images/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://brandyourbody.com/images/coin-master-today_GM406889139.pdfIn PDF document text
    • http://brandyourbody.com/images/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://brandyourbody.com/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://brandyourbody.com/images/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://brandyourbody.com/images/coin-master-fb-free-spins-link_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
stream_004_off00004ff5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF5 26396 bytes
SHA-256: 92884293b18957190716bcae551e80de2a460c06f91a386010ba710314c66c3a
font_01_sfnt_off00008cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD9 3988 bytes
SHA-256: cdace327da6e9af1f69bf1f5694f63bf44185d9997da43c0fafeb9baf6864799
font_02_sfnt_off00009a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A00 18624 bytes
SHA-256: 905b6042c9fb3243bbb8e946cb6bbe2abeda8ad85fac4d397ba1c1d43f9ec99b

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