Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75c7e03af85155d…

MALICIOUS

PDF

39.1 KB Created: 2021-05-10 15:40:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4c3bc96da275674d2c078bbd74cf08df SHA-1: 729c0e82bd2937f81f2282da10a3d5a4d07c2aa9 SHA-256: b75c7e03af85155d68113059874dff5f5b76bcc8806a4bfc4e2a3b4a84f91bf1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, disguised as "game hacks" and "free spins" for popular mobile games. The document body explicitly contains a call to action and directs users to a primary malicious URL. The presence of embedded URLs and the ML classifier firing strongly indicate malicious intent, likely to lead the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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/coin-master-free-spin-whatsapp-group-game-hack In PDF document text
    • http://miriammcconnonart.com/images/get-robux-today_GM431946152.pdfIn PDF document text
    • http://miriammcconnonart.com/images/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://miriammcconnonart.com/images/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://miriammcconnonart.com/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://miriammcconnonart.com/images/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://miriammcconnonart.com/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://miriammcconnonart.com/images/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://miriammcconnonart.com/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://miriammcconnonart.com/images/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://miriammcconnonart.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://miriammcconnonart.com/images/uprobuxcom-free-robux_GM431946152.pdfIn 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_003_off00003d81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3D81 24804 bytes
SHA-256: bdf4712e1240324713f262e310799371a00eb3ac0ff76416df3d9ca9758c7204
font_01_sfnt_off000076b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B5 18392 bytes
SHA-256: 60a6361e6fc3388894d0b11e150a687c52e9f5db442fe66c80805b9ea3a4dad4

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