Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b39aa6324ce537f…

MALICIOUS

PDF

43.7 KB Created: 2021-05-12 18:02:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4e585ea5152c91ca043254e3cf0624fc SHA-1: a44b92385b2c1897d5dfd29c17c95480df20afb1 SHA-256: 8b39aa6324ce537f669066b5691888a226fb0da4ab108242f06e258938bf98c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as game hacks and free currency generators. The primary lure URL is 'https://netcdn.xyz/app/431946152/how-to-hack-roblox-for-robux-game-hack'. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector designed to lure users into potentially harmful content, likely as a first stage for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/how-to-hack-roblox-for-robux-game-hack In PDF document text
    • https://jas8.com.tw/image/data/files/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/robux-converter_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/roblox-avatar-editor-free_GM431946152.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_off00004a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A4E 26488 bytes
SHA-256: 11267a7c383c3787deb85da7a42501a54e9658ee3122333dd91d5b14e75c0e6c
font_01_sfnt_off00008749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8749 18648 bytes
SHA-256: 7689b6731d47fc176aef925fc5194a10a34d162e90d7014a3ccea13949bcaf7e

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