Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7158909cb05560…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 04:54:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f1ad7ba3df2484792c6e1001387feb84 SHA-1: f2e73ce722ea9d406570901e1bb6c8be1b8164d0 SHA-256: 7e7158909cb05560270cb48b88cc2ca7a5385d3fbe882d029a7c1e11d0bf96a0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks, specifically mentioning 'free Roblox characters', and links to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or redirection attempt to a site likely hosting further malicious content or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/free-roblox-characters-game-hack PDF link annotation
    • http://elibrary.smknesbu.sch.id/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/optifine-pe_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-generator-com_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_004_off00005487.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5487 24444 bytes
SHA-256: 6c574b87dc82485ee81d4bbbf2bf1de9b054f56ae801c3e31c8a424b09da43d9
font_01_sfnt_off00008c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9F 18448 bytes
SHA-256: 0263947262242f4b31913ad3d0f55b2be151042c00d915c510b843208e81fc00

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