Malicious PDF — malware analysis report

Static analysis result for SHA-256 703e715c8be75dc7…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 18:19:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0c604873487fb997b15196e386c94b42 SHA-1: 685273bb4b0d79dfc1c9754ec39732f95e275fbe SHA-256: 703e715c8be75dc720836bcfa38fe5a13a4998652acf5741a86c5c85f0215b6d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are disguised as game hacks or free currency generators. The primary link, http://netcdn.tw/app/431946152/robux-2021-game-hack, is identified as a redirector for game hacks. This suggests the document is designed to trick users into visiting potentially malicious sites for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded links strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/robux-2021-game-hack PDF link annotation
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-and-tix_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/roblox-robux-artmoney-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/adventure-cheat-codes-roblox-id_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kebumen.sch.id/__statics/gudangsoal/files/coin-master-hack-link-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_off00002f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F73 22600 bytes
SHA-256: 8f7421c1cb3de5243a8908451c3cf940855867fe57b5c1eed514dad16945df8b
font_01_sfnt_off000061f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F4 18956 bytes
SHA-256: 03f490474d7ca969cd9c035121b9b885a49cfdd7fa0568d5688fc6c6f9ec8423

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