Malicious PDF — malware analysis report

Static analysis result for SHA-256 958ccd9784652714…

MALICIOUS

PDF

49.5 KB Created: 2021-06-07 04:06:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b68998bdded7826beb643db8bc0c90f2 SHA-1: 204976472a655863f1299e6031fdcb8fbd22036f SHA-256: 958ccd9784652714e9e9be581a092555c8ceecaaf468053b480ef3c0b1aa9442
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9796

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/free-robux-codes-2021-live-game-hack PDF link annotation
    • https://www.e-starmagazine.com/uploads/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/free-800-robux_GM431946152.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/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/roblox-website-robux_GM431946152.pdfIn PDF document text
    • https://www.e-starmagazine.com/uploads/files/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000515d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x515D 25532 bytes
SHA-256: f7190cdbbbd594a6af94d1cb03db7c0fbdf1318bff8336bdffeb024c3c0fd85f
font_01_sfnt_off00008cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD8 6700 bytes
SHA-256: ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27
font_02_sfnt_off00009d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D16 18824 bytes
SHA-256: e3740a42aafd03f1f86d4a3167fe4ee4b5073a597dc4278065a319f9a097d2fc

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