Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc716dfba6e45e8…

MALICIOUS

PDF

38.8 KB Created: 2021-05-21 23:36:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6c2abf122aac839525bd231a8fb92211 SHA-1: 8adf8f8cbe775fdd4e5bc81ac8901eb5d3bef9f3 SHA-256: 7fc716dfba6e45e85ec4d18aebe367c41dd02315f24d68f4658987530186cdaf
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs and a lure related to 'Free Robux Generator' and 'game hacks'. It also displays a fake CAPTCHA, indicating an attempt to trick the user into interacting with malicious content. The primary URL leads to a known malicious domain, suggesting the document is a phishing lure designed to redirect users to potentially harmful sites or download further malware.

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/431946152/free-robux-generator-game-hack PDF link annotation
    • http://vedrachemicals.ro/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/haktuts-coin-master-free-daily-spins_GM406889139.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
stream_002_off0000339d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x339D 25408 bytes
SHA-256: 524da7f82f7beef689d53aa2e34c5ceb61d4ae43f98b453062ba8ec9587aae95
font_01_sfnt_off00006bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF7 2892 bytes
SHA-256: 514441e3a61c7cc138b3cbbe184afd2860f6700b5711ffaa39edf87d0986d11e
font_02_sfnt_off000075ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75EC 18344 bytes
SHA-256: 10e3e3d4c68cd560ea953d22ca565409121c707f4baa42eec19ee19970d6ace4

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