Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be2dbda280a9907…

MALICIOUS

PDF

42.7 KB Created: 2021-05-19 04:31:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 510509a9a5f38680d2061472efce5e61 SHA-1: 163b84ea794012856d051b0ef3ee434b323f6ae0 SHA-256: 1be2dbda280a99073a26b40302ca1878c3f94b3ed518a40125aaac433eb9df2a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game hacks and in-game currency, indicative of a phishing or scam lure. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/1330123889/pubg-uc-buy-cheap-game-hack PDF link annotation
    • http://hocquaux.fr/images/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://hocquaux.fr/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://hocquaux.fr/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://hocquaux.fr/images/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://hocquaux.fr/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://hocquaux.fr/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://hocquaux.fr/images/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://hocquaux.fr/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://hocquaux.fr/images/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://hocquaux.fr/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://hocquaux.fr/images/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://hocquaux.fr/images/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • http://hocquaux.fr/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://hocquaux.fr/images/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://hocquaux.fr/images/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://hocquaux.fr/images/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://hocquaux.fr/images/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://hocquaux.fr/images/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://hocquaux.fr/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://hocquaux.fr/images/coin-master-hack-tool-without-human-verification_GM406889139.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_003_off0000472e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x472E 26828 bytes
SHA-256: 78d91906b3635f024f80fdd15d15c07c50cade9fb32a0560f9394492ef228486
font_01_sfnt_off00008390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8390 18648 bytes
SHA-256: 4acc18fe7a00521a3824ec71434aec5e7fc6f5eb36fa4d750a26abd37ecbcb4a

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