Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82ed2d67e2799b0…

MALICIOUS

PDF

41.5 KB Created: 2021-05-22 19:17:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d39abab075eb753d483815ac151d71af SHA-1: 50027395a96b49a67b38b6461c21f9fc7a936d13 SHA-256: f82ed2d67e2799b0bac90cdb2b32249acc0a2886b0e7273e0093a1b829eee9ae
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a "free Robux generator" lure, which redirects to a malicious URL. This indicates a social engineering tactic to trick users into visiting a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8120

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/make-free-robux-game-hack PDF link annotation
    • http://arpinoturismo.it/images/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/tiktok-par-free-followers-kaise-badhaye_GM835599320.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-get-free-spins-on-coin-master-2021-ios_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_off0000362d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x362D 27428 bytes
SHA-256: 8c58d243297e2df19dd1ed012499c55a99759b59eb95aa36ee67375a752876b3
font_01_sfnt_off00007631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7631 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000801c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x801C 18608 bytes
SHA-256: ffc801fe6c311414aab45f29f725ac19f85306497fb99419c1a1229f9950fbca

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