Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d7bbe58bffc991…

MALICIOUS

PDF

39.0 KB Created: 2021-05-21 17:10:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5c9b1c371006b7e45282ceaf6a76ae3a SHA-1: 9a021e2c7ac94cdd522ff46eee8e4ec8157a6b3a SHA-256: 30d7bbe58bffc991e09100896a69318dd548cab7afbc42bbebe113f6ae7c0fa1
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 0.8060

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/479516143/minecraft-noob-vs-pro-vs-hacker-vs-god-game-hack PDF link annotation
    • http://jobsy.com.sg/images/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://jobsy.com.sg/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://jobsy.com.sg/images/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://jobsy.com.sg/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://jobsy.com.sg/images/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34F2 25140 bytes
SHA-256: 0779ed53ee2918d1176123562ec65156a241e137d2943081d7d96ae3cd452bf7
font_01_sfnt_off00006cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBF 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7670 18500 bytes
SHA-256: 35163f059b41a7a3602679841a335cd83055ee85c0a72342166b4475486ea273

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