Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4c71dcbe8a2dc6…

MALICIOUS

PDF

47.3 KB Created: 2021-05-17 11:30:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7aa61cc1f207116dca191a0239414d6b SHA-1: 68de6abd32e610cef9da35a920ad6d4d704dc55d SHA-256: 9e4c71dcbe8a2dc6fae8f7098f0d3d71bb51bb90e10977a5d8bfcdbfd15838b0
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed as a link farm, with many pointing to game-related hacks and free currency generators. The primary lure, 'How To Get Roblox Money', directs to a URL that likely serves as a gateway to malicious content. The PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-to-get-roblox-money-game-hack PDF link annotation
    • http://asiasieja.pl/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/game-toolbox_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-hack-without-human-verification-2021_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_off00004b3f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B3F 26468 bytes
SHA-256: 4961c32aa1a7cc984d6dc4be5b075d3e517d343aacde27ababb8d2e743cc6dc1
font_01_sfnt_off000088d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D9 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000095eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95EB 18428 bytes
SHA-256: c447f334fad9b15f432f5aac5fa8081b18071b5b9f1330fc1e6c33f3b8eba776

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