Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a644d797505a2a…

MALICIOUS

PDF

34.3 KB Created: 2021-07-02 03:42:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a32b4582c17ad92dc7b7e4a6e066617b SHA-1: 777f37a9cecd5fc9024c9d26427958e545de56b3 SHA-256: 47a644d797505a2a673900f391dc319a76a8107b60b306b47567bb60b4f22f3d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, identified as a link farm, that redirect to sites offering game hacks and cheats. The document body and heuristics indicate a lure to download potentially malicious tools, likely as a form of social engineering to distribute malware. No scripts were extracted, but the extensive use of SEO-optimized links suggests an attempt to attract users searching for game exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/download-hack-tool-for-roblox-game-hack PDF link annotation
    • http://stikespantirapih.ac.id/home/repository/roblox-guest-clothes-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-games-that-work-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/isuku-roblox-free-shop-hose_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-earn-robux-without-cheats_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-promo-codes-website_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/2021-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-hacker-tshirts-images_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-give-yourself-free-robux-in-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/admin-commands-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-hacks-2021-for-robux_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
font_00_sfnt_off00003000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3000 21860 bytes
SHA-256: 1d4303ed253af5d929afa2fd5225fb7766d40885dd7d7aef6fa1a47e22de6c58
font_01_sfnt_off00006040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6040 19328 bytes
SHA-256: 981abb163c64618a47e1c974303a23b7046e9784a13a86a73f2f02a4caf1b43a

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