Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2bb41aa69f6c64…

MALICIOUS

PDF

45.1 KB Created: 2021-05-11 04:38:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3af953596c1cb006a0dce718804c56d4 SHA-1: 54ca039beddd647333ea8192fd4471687e72df43 SHA-256: ef2bb41aa69f6c6401155c3b1cdc7f5cfc878476f7b58c89afd375f81ed69dd6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains links that redirect to known malicious infrastructure, specifically promoting "game hacks" and generators. The document body and embedded URLs suggest a lure for users seeking in-game currency or cheats, which is a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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-hack-tuts-game-hack In PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/robux-no-survey_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/roblox-18_GM431946152.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-online_GM406889139.pdfIn PDF document text
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a4b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4B 25740 bytes
SHA-256: da883a8f3ead1b85b51678ae7f7ee241691ef569e9a5b68e9ff11a3ead475d62
font_01_sfnt_off00008510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8510 2924 bytes
SHA-256: ac3269c20017f71c8694a49264365a808650333b0ed34827541dea5399831fb3
font_02_sfnt_off00008f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F24 17856 bytes
SHA-256: 7ea96389f12658db35895fa26686e9f226c03f756b3b8bcc05ec7a18db0b2f9d

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