Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52f6f9e1574b378…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 13:16:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 34af4239a33335289cef8369bf120f8c SHA-1: 39bf5bacb01423e1bde941c41f6c50e690b74ec1 SHA-256: d52f6f9e1574b37891f16134576c15afd11ed23a5eb5a9cfd7141d435edd6ac5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is http://netcdn.tw/app/479516143/how-to-get-java-minecraft-for-free-game-hack. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for further malware delivery or credential harvesting.

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/479516143/how-to-get-java-minecraft-for-free-game-hack In PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-hacking-users_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/r67-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/pin-codes-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/download-roblox-go-through-wall-hack_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/pokemon-go-free-cheats_GM1094591345.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/cheat-tower-battle-roblox_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-cheat-codes-mobile_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
font_00_sfnt_off00003532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3532 22064 bytes
SHA-256: 91aeac1de1f4e917540c006fc7b46fe1de260dfd8077fc6b59cb317644d98cbe
font_01_sfnt_off000065d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D3 18444 bytes
SHA-256: c9d7907f94a8ada23db2a769c78fce1d5854e09f64104062867272f149f89d70

Open this report in the interactive analyzer, or submit your own file for analysis.