Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2b3e7526069de2…

MALICIOUS

PDF

37.3 KB Created: 2021-05-21 23:15:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f07b93d544196f89408906ea2735a199 SHA-1: 217b4b46fb53bf5aba133f0171245e5534e8320d SHA-256: 0c2b3e7526069de294951fa3b1696bba0d39265ebad640fad61a18522b320f5d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/how-to-install-minecraft-for-free-game-hack PDF link annotation
    • http://foo.com.tw/files/roblox-gang_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://youtuIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003749.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3749 25492 bytes
SHA-256: 66c989822fb897e45047a7f0f61d20f1b0d2278361b4f64485a10da442bf7ea3
font_01_sfnt_off0000718d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x718D 17948 bytes
SHA-256: 5e3ba7e4cd3ca4e9461728952bafe8ac7745d23e1bc3d1385ef5be4278fd35be

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