Malicious PDF — malware analysis report

Static analysis result for SHA-256 671ef51812a4fb46…

MALICIOUS

PDF

43.3 KB Created: 2021-05-10 16:34:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d0ec65ae9ed46ad5a90122e88301cf70 SHA-1: 4e6d62233d6eaf74bff3959fd7929ab46ae4e54f SHA-256: 671ef51812a4fb468c7c543949d878746f7d2f474782d2d2cac35843f7ca7df3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/406889139/coin-master-spins-hack-game-hack PDF link annotation
    • http://perpus.wdh.ac.id//repository/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-generator_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-free-edition_GM479516143.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_003_off000046dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46DC 24108 bytes
SHA-256: 8dc356a51249228a6c1293b7834a56fa87d747b02105e2ca29a659d985205294
font_01_sfnt_off00007dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBA 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000087a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A5 17892 bytes
SHA-256: 7f3ff29013eb9f1a81458cbc85dd3db40ecf793c6bb68bdfdc199744a029032c

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