Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43e568b76b4f63b…

MALICIOUS

PDF

42.9 KB Created: 2021-05-21 23:06:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bcc7d8a6722376b057e99c578ca460f8 SHA-1: 76b085c3cd2e37772417f8d9821cab4fa36815c5 SHA-256: e43e568b76b4f63b590ea15876e2811f1a30cc0cc4f6ad01d451461fbbc854d2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'Free Robux' and 'game hacks', directing users to a malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a potentially malicious site for further exploitation, likely involving a download or credential harvesting. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7429

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-no-verify-game-hack PDF link annotation
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2lamsel.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000345e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x345E 28604 bytes
SHA-256: 4c857cab5073f90df280f753733467d4e1489d5670d7259e3b29315dfdf7f776
font_01_sfnt_off0000742c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742C 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_02_sfnt_off0000860f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860F 18448 bytes
SHA-256: c82a2e535d1b02ce633786be567827726fc21df48f71ae9cb05a1d9866072f5e

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