Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1cedc2b19e52b40…

MALICIOUS

PDF

37.2 KB Created: 2021-05-21 20:07:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ea263b1946d82ba804349b467b98d8db SHA-1: 78c5f5fb910158ae47972b53840417f1ba331fb4 SHA-256: c1cedc2b19e52b40e7ddaaa5d1241fb2624ff87a44517508593f94d1d880a4fc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'free Robux' and 'game hacks' to entice users to click on embedded links. The primary malicious link directs to a suspicious domain, likely serving as a landing page for further exploitation or malware delivery. While no scripts were directly extracted, the PDF structure and embedded URIs indicate a social engineering tactic to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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 https://netcdn.xyz/app/431946152/free-robux-hack-no-verification-game-hack PDF link annotation
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://www.advanceenglish.com.au/uploaded_files/userfiles/files/free-roblox-accounts-with-builders-club_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
stream_002_off0000341b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x341B 25476 bytes
SHA-256: 18e8af37321a20d782a766180de7d83dd9b2c247b9548efb92bfb0a556129395
font_01_sfnt_off00006e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E88 18772 bytes
SHA-256: 87cd01898e0c435f6b8e3fdf3db31fb3453f40f32176463e71dafc861d9bd3f7

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