Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a26d436c7e67199…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 20:46:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b771c5bc93c67a60d2a84872ad08948d SHA-1: 81c8289aca21257b906903f53743d47c7d941324 SHA-256: 1a26d436c7e67199cec043c34394afa5b5be470dfdc8ab5ef1d2009dd3e5a3d8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, disguised as offers for game hacks and free spins. The document body and heuristics indicate a lure to download or access potentially harmful content. Although no scripts were explicitly extracted, the nature of the links suggests a potential for further malicious activity, such as downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/google-coin-master-free-spins-game-hack In PDF document text
    • http://library.imz.or.id/repository/roblox-cheat-tool-download_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-redwood-prison-free-gamepass_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/hex-code-hacks-not-working-roblox_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/http-wwwfree-robuxcom_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/no-key-free-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-prison-life-hack-script_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/magic-training-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/hack-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/noclip-cheat-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-roblox-ad_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-links-to-coin-master_GM406889139.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
font_00_sfnt_off00003107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3107 22572 bytes
SHA-256: a234ee6e463b0462af04edfdec293c1c400a49e5cd89688efafd2fa2f7f2f980
font_01_sfnt_off0000634d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634D 18248 bytes
SHA-256: 030bed7090460e4d71b0ce795308f81d11b161da8a2958b6b82163bc1faa59de

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