Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a6d16d12059b9b…

MALICIOUS

PDF

33.2 KB Created: 2021-07-20 06:12:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1f408184c55e17bfdfd2aaaf11aed64f SHA-1: 03f6a5d2f92b44966e2a43841e8831cf2865930c SHA-256: 25a6d16d12059b9bd9b5de5c58093bf84754be8e84f6a22fee423d904a18ee90
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/free-coins-for-coin-master-game-hack. The document body and embedded links suggest a lure for game hacks or generators, which is a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.tw/app/406889139/free-coins-for-coin-master-game-hack In PDF document text
    • http://suryaartajaya.co.id/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://suryaartajaya.co.id/images/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://suryaartajaya.co.id/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://suryaartajaya.co.id/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://suryaartajaya.co.id/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://suryaartajaya.co.id/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://suryaartajaya.co.id/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://suryaartajaya.co.id/images/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • http://suryaartajaya.co.id/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://suryaartajaya.co.id/images/free-robux-no-human-verification-or-survey_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
stream_002_off00002ca3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CA3 23376 bytes
SHA-256: d04d72df4f4934f41761e8038e4579cb1c59554825f7547b7cb5ec710c7fef72
font_01_sfnt_off0000618e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618E 17712 bytes
SHA-256: fd51fa1b849cf95139b510f282bcd47e41e352499df1938c7ca947a320e7b070

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