Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b0f78a51d4593c…

MALICIOUS

PDF

34.6 KB Created: 2021-06-28 06:20:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b94cb37ece9cd387d8aa96440e245283 SHA-1: c9ca92a94fda53fb06c9d2712706ce75089eb935 SHA-256: 14b0f78a51d4593c83342fc9bbc4f5d02507ee53c370fe1f7d32eb3605654f07
188 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link to a known malicious redirector, disguised as a 'free generator / game hack'. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting the malicious site. The presence of XFA forms and malformed streams suggests exploitation of PDF vulnerabilities to deliver this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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-avatar-editor-game-hack In PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-captain-america-costumes-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-no-human-verification-real_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/roblox-working-strucid-aimbot-hack-2021-august_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-free-robux-2-15-2021_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-admin-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/smurf-backpack-gives-free-robux-roblox-hack_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/abd-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/inquisitormaster-free-robux-website_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-village-4_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/tiktok-free-100-followers_GM835599320.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/easy-robux_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/download-hack-coin-master-apk_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3012 22360 bytes
SHA-256: d49b2f490214135fd517c9708f591087c6f15ca1f12866e07c7fb20d2991ed6a
font_01_sfnt_off000061f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F4 19164 bytes
SHA-256: 728934368c522981bc5680af310494a3731819a5a5739d7f411e1c2fd8e8b3b8

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