Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1b2e0af9baa277…

MALICIOUS

PDF

45.7 KB Created: 2021-05-12 16:39:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8057806eab1ce2805d7671db37049ae2 SHA-1: 3fbd1cee745eb71cc41658eecf8ed51d18b11122 SHA-256: 4e1b2e0af9baa277806eb8ab40b407fc27fc46a8ebd61082cbabf24f2626df08
102 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 0.9432

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/roblox-cheat-codes-game-hack PDF link annotation
    • http://202.56.165.220/digilab/repository/roblox-com-games-referrer-roblox-player_GM431946152.pdfPDF link annotation
    • http://202.56.165.220/digilab/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/robux-offers_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/my-robux_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/simplysarc_GM479516143.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://202.56.165.220/digilab/repository/earn-free-spins-for-coin-master_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_003_off00004cad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CAD 24792 bytes
SHA-256: 9d817f85cfd9145276304804b75fc483a71db1bd9b1aa65ba4029c21d186f241
font_01_sfnt_off000085c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C8 2824 bytes
SHA-256: 45bf821f81e84f4aa8d8374f492b182b36404f38b462c7dc471deaad6ab5c104
font_02_sfnt_off00008f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F76 18456 bytes
SHA-256: 79411d0a2da13a8acff975e82d989f343be59a98b2b19e39ed5663a4026c58d6

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