Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc391fd835fed9c…

MALICIOUS

PDF

34.1 KB Created: 2021-06-26 16:04:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5f9a34474e352aac6be2b5f43078b689 SHA-1: 6617d22b4f99d79e6e9345d1dafda286177b6fb0 SHA-256: 6fc391fd835fed9c3aa01b19e5ab2aff3b16766f89fb72e10214196c19e90704
82 Risk Score

Malware Insights

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

This PDF document employs a common lure of 'free game hacks' to entice users. It contains an embedded URI pointing to a suspicious domain, likely serving as a redirector to malicious content or a phishing page. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious campaign, likely initiated via spearphishing.

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 http://netcdn.co/app/431946152/free-robux-box-game-hack PDF link annotation
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/free-robux-so-sick-free-card_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/roblox-blood-moon-tycoon-hack-vechiles_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/why-isnt-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/earn-robux-free-online_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/roblox-free-clothes-template_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-mining-simulator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/consle-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/roblox-how-to-get-car-crushers-2-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/roblox-cheat-engine-tablre-and-bypass_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/www-roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/roblox-free-wings-code_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn3kediri-kota.sch.id/__statics/gudangsoal/files/get-anything-for-free-on-roblox_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
font_00_sfnt_off00002fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCF 22192 bytes
SHA-256: 92fde53d23c3f334493cb6aaf9496d3a159b13243accf57f79a71c04f21214d5
font_01_sfnt_off00006139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6139 18716 bytes
SHA-256: c44d41bde01792b3072e77d034d08262c73b564a90ff011a647004b7e6980a44

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