Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfbd0d0b6f135c33…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 15:04:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8c3d27d50bd2974e6fc08e10532e77b4 SHA-1: e67bdfd167df89785ccbaa6b1130654784e5dbc8 SHA-256: cfbd0d0b6f135c33b7086baa11fe09b66e6fc4046b52b79fe996294ecc37a11e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'Roblox Robux Hack' and directs users to a suspicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent. Although no scripts were explicitly extracted, the document's structure and content strongly suggest it is designed to lead users to a malicious site, likely for credential harvesting or malware distribution.

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.tw/app/431946152/roblox-robux-hack-game-hack PDF link annotation
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/nuevo-hack-16sept-generador-de-robux-by-piignoiise_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/free-roblox-no-plsy-stor_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/pastebincom-catalgo-roblox-hack-alternativo_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/code-cheat-card-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/roblox-free-thumbnails_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2jember.sch.id/__statics/gudangsoal/files/coin-master-hack-blogspot_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_off00003135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3135 22004 bytes
SHA-256: 52c3998ee8416f1961eab7b0f0b11729d1656c98d79911f03df1bd4e7c123b4b
font_01_sfnt_off000061c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C1 18796 bytes
SHA-256: ac85a7f36e8d2c6b778aa8e0527eba638abc788d16e2325ecdb460050b0ba6ed

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