Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d13a0ea9cc1cb1…

MALICIOUS

PDF

32.3 KB Created: 2021-07-09 08:01:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e2bfd9c39a559369eba8e3d039625704 SHA-1: 1b177d815770c14960eeadf4487e009db360bf55 SHA-256: d8d13a0ea9cc1cb1bf9b27ca36bc58e8ec4137c8de504082ec9a110b407ac6bf
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-confidence heuristic firing for a 'GAME_HACK_REDIRECT_LURE', indicating it links to a site promising game hacks. The document body and embedded URLs reinforce this, pointing to 'robux hacks' and similar lures. The ML classifier also flagged the PDF as malicious. The primary IOC is the redirector URL, which likely serves as a gateway to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/robux-hacks-2021-game-hack PDF link annotation
    • https://www.ak-oroslavje.hr/files/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/rcm-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/hack-in-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-roblox-app-for-ipad_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/new-hack-for-roblox-2021-december-download-mediafire_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/banning-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-glitch-ios_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/tiktok-hearts-free-2021_GM835599320.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://www.ak-oroslavje.hr/files/roblox-avatar-maker-free_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
font_00_sfnt_off0000299b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x299B 21496 bytes
SHA-256: 60ef04f59fb45b606985355932b12cf4b90259e07858a3b337075ea006496a27
font_01_sfnt_off000058d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58D5 19124 bytes
SHA-256: 5acc4cb5eca619de91ddb47cdc70e87d550a63f617f877071c9ac47b9f2637f1