Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c248108cf0df682…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 05:22:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 349d30fe4ae27f9f5effb4b4e8f9c3c1 SHA-1: 3130a0fc404b7cdfb44d0059c35ca8abd56223c0 SHA-256: 3c248108cf0df682aeb59edd4f7d8e195b116dcf54f847ad4c52a84bbb495426
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and currency to entice users. It contains multiple links, including a primary malicious redirector at http://netcdn.tw/app/431946152/free-robux-hack-game-hack, which is designed to lead users to potentially harmful content. The document's structure and embedded links strongly suggest a phishing or scamming attempt, likely aiming to deliver further malware or exploit user credentials.

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/431946152/free-robux-hack-game-hack In PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-future-hack-scripts_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/get-free-obc-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/jump-cheat-wearedevs-roblox_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-your-own-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-uploading-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-v3rmillion-cheat-engine-bypass-hack_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/comment-hacker-un-conte-roblox_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-pick-a-side-roblox_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-tiktok_GM835599320.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_off00003083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3083 22612 bytes
SHA-256: 2c45bac67aef74269b6dcaf32657755d8e8e4e6acbb5faddce86fc8db32148a6
font_01_sfnt_off000062ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EC 18884 bytes
SHA-256: dc79040e010cad5ef573560dd0163568f4a40b7ac77bac9f212c194fdd2f4c7b

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