Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1aa18acc5d3f24a…

MALICIOUS

PDF

33.6 KB Created: 2021-07-09 04:05:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 221aa91b5b57321de78586a880d9bd55 SHA-1: b7ffcb0299a9a31e9eb28eb1d331f0e0668919aa SHA-256: f1aa18acc5d3f24a650463649a0c797d5fbe4ec0316dc90cca615a00815d8d86
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 0.9980

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/431946152/roblox-hack-scripts-pastebin-game-hack PDF link annotation
    • https://www.donjastubica.hr/files/how-to-look-like-a-noob-on-roblox-mobile-free_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-catalog-hack_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-no-survey-or-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/hack-for-dont-blink-roblox_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-hack-userscripts_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/2021-bt-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-join-builders-club-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-hack-mad-paintball-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/robux-link_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
font_00_sfnt_off00002db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB6 21904 bytes
SHA-256: e72c3289057550d55b97c9393a397903169e183396061136ff545e01922d5136
font_01_sfnt_off00005db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB8 19212 bytes
SHA-256: 46b8535cd4ab0c6c32fa43c13492b1dbcacac03349de8f770ca192070773bb97

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