Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e43be4fa7e6481…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 03:32:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dcb4d07978fbaba26e79ed726c855916 SHA-1: 229b39c2faba542bbc66cbbb3a22f6bf832fe29c SHA-256: b9e43be4fa7e6481bc845bb11c861854d00dc4a9052a702ed3d0519987ad832c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9980

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/406889139/lastrick-com-coin-master-hack-game-hack PDF link annotation
    • https://www.e-starmagazine.com/uploads/files/hack-avatar_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/pubg-uc-codashop_GM1330123889.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-phantom-forecs-hack-scripts_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-roblox-spilen_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-get-free-robux-one-step_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-root-hack_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_off0000309a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309A 22616 bytes
SHA-256: 4bf659d812106c0ce851e939cc4b9426691406ab1fe95c45c9dfdfbd610151ae
font_01_sfnt_off00006353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6353 18264 bytes
SHA-256: 7487f1ced9a0ef44a39375eecee508f8bc18e69c364675b0881c5394564d02ce

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