Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e19aa944a6d7796…

MALICIOUS

PDF

42.2 KB Created: 2021-05-12 11:31:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f400550c9e31253a7125b693965be9d9 SHA-1: 315f18e8bfc1e8e7543843db8fad7b5122e20d7e SHA-256: 8e19aa944a6d7796bb58e517bc0276f23254a068f480742b6f1f03563299991d
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 0.9971

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.xyz/app/431946152/free-robux-sites-that-work-game-hack PDF link annotation
    • http://techmobil.pl/images/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://techmobil.pl/images/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://techmobil.pl/images/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/roblox-hack-ga_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004789.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4789 24816 bytes
SHA-256: a6bbed813223c0a35091f1e7ee5e19f64ed0ee653a0b1fc1835f9c142c1d3a2f
font_01_sfnt_off00008065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8065 19000 bytes
SHA-256: c0bc6bb0706fab35ff455fc4816471a1ab7f6ae4486f691ef98043b3efa3f18d

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