Malicious PDF — malware analysis report

Static analysis result for SHA-256 441b32fdcab2d62c…

MALICIOUS

PDF

45.3 KB Created: 2021-05-18 01:36:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fd7f63ed4c20a0f1e52b4582cf31b8a3 SHA-1: 69f3227859eda1c6187c8c99d56a97657c967d6c SHA-256: 441b32fdcab2d62c111183ddc7b0cf2dc2f09a3d788bcf15610e3d6b1bcd6346
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a prominent link to a website offering 'free Robux' and game hacks, a common lure for malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a phishing or malware distribution attempt. The document's content and heuristics indicate it is designed to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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 https://netcdn.xyz/app/431946152/free-robux-kid-friendly-game-hack PDF link annotation
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/more-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/roblox-data-breach_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1medan.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification-or-survey_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
stream_003_off000049fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FC 29816 bytes
SHA-256: df115f15b3651144e61c8bfa8cf4638818609bae108b62e9035efc359cff5755
font_01_sfnt_off00008e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3C 18560 bytes
SHA-256: 454f7722b5e362ebb3dfaacf6303323d9fe80b0a3b091af17d82283aff73172d

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