Malicious PDF — malware analysis report

Static analysis result for SHA-256 1958d293026f4d64…

MALICIOUS

PDF

49.5 KB Created: 2021-06-10 21:45:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: defd0cc2c3735214c978536bbe7b4659 SHA-1: e7adfea3c04fbd0368650be246e76ab3c22d9464 SHA-256: 1958d293026f4d640c0a1fcfac83487f70aded410653014e50542359457f9e54
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and generators. The primary lure is a link to 'netcdn.tw', which is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially harmful sites.

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/i-will-hack-and-not-kill-parent-fashion-roblox-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/robux-hack-generator_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005304.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5304 27396 bytes
SHA-256: 18894af2e2bdfdd5a92469661326d9029298acc53b6f233ca5c88073ad07b1eb
font_01_sfnt_off0000929c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x929C 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off00009c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C3D 19260 bytes
SHA-256: 8cd88631be2da51a61903cfc089caa2cd3472d1f2fa16928354e13a71fbbce28

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