Malicious PDF — malware analysis report

Static analysis result for SHA-256 e37b253014c854de…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 07:07:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 016cec8c06d16165eb9f5295121dab81 SHA-1: f099035fe906606d8628272f0a47dbc33ec2d20f SHA-256: e37b253014c854de1edbd91071df33c62626dfd5d9ff38cc85a2adb88e39384f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

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.co/app/431946152/can-you-get-free-robux-on-roblox-game-hack PDF link annotation
    • https://vierabyragazze.com/upload/files/unpatchable-free-robux-made-by-robuxian-for-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/john-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-robux-inspect-element-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/wurst-hacks_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/cool-backgrounds-roblox-free_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/black-tshirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-2021-roblox-account_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-roblox-card-codes-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/all-the-roblox-redeem-cards-in-the-world-for-free_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-download_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-cheat-phantom-forces_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_off00002e48.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E48 22444 bytes
SHA-256: aaa262d55dc2f3a8a0bc6039d734f2701720ebc1eca334fa7835e4e983d259d1
font_01_sfnt_off0000601d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 19056 bytes
SHA-256: 212cafc25ec0536741ac5c1aa90543f36b34a777adc44243741e4ba36ab4d37b

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