Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0829d290cafbaa5…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 17:33:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ae5a3d3754810a3f781d56e22037b7af SHA-1: c9e542016eb2fc9cfdf320b75154749f43fe0436 SHA-256: c0829d290cafbaa551afb522afe54a7cde47b9a05237bbf7c858a3553b237f82
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector pointing to 'http://netcdn.tw/app/479516143/minecraft-font-free-game-hack'. This URL is presented as a lure for game hacks or generators, indicating a social engineering tactic to drive traffic to potentially harmful sites. The presence of numerous related PDF files on the same domain suggests a campaign distributing such lures.

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/minecraft-font-free-game-hack In PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/wurst-client_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/roblox-verification_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/robux-hack-no-buying-apps_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/pokemon-go-free-coins-android_GM1094591345.pdfIn PDF document text
    • https://www.elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-roblox-accounts-list-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/how-to-buy-robux-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-scam-website_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_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_off000031b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B2 22260 bytes
SHA-256: e464c0757e49008e54d0922d3b557c616165b86e1b4d5f84bebabb00e55576ec
font_01_sfnt_off0000629d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629D 17996 bytes
SHA-256: 1349cd4e0d557016c08a9b992d3688fa2f7b3c2a17b956817b71236e999620b9

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