Malicious PDF — malware analysis report

Static analysis result for SHA-256 87f5de9606fafd31…

MALICIOUS

PDF

39.3 KB Created: 2021-05-15 12:05:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 96fbb8b09eef242d5a0edaa19f6fe98c SHA-1: 1efdc33a24e1961c7d60a4861346bf8f0e8400ef SHA-256: 87f5de9606fafd3151cc93c2ae8cf335183fad8f2d50769977f39edf887796ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that host other PDF files, disguised as game hacks and generators. These links are identified as malicious redirectors, indicating a likely attempt to lead users to a malicious download or exploit. The presence of a 'Click here to download' phrase further supports a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9217

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/406889139/kachifpro-game-hack In PDF document text
    • https://www.ayampotongsyariah.com/ckfinder/userfiles/files/roblox-hax_GM431946152.pdfIn PDF document text
    • https://www.ayampotongsyariah.com/ckfinder/userfiles/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://www.ayampotongsyariah.com/ckfinder/userfiles/files/how-to-use-wurst_GM479516143.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_003_off0000382e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x382E 30008 bytes
SHA-256: edb2639e1bd6d918c9f472665110a1fd575e94c24b55c75120ef56b19e79f9f3
font_01_sfnt_off00007a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A01 17784 bytes
SHA-256: f5f16e9fe06415f99f9f196ec79e922628d3dac9c37f6a7894d79eeb781dffd0

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