Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e433f3051679f9…

MALICIOUS

PDF

42.8 KB Created: 2021-05-14 15:15:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4558056411ad8568aef50e98f5666218 SHA-1: 900068d669af5918dddb784a52b355b1cbea77e0 SHA-256: 20e433f3051679f9bc150916a31a888a2ae2178fb0cc03ea6f70a408a674cc0c
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a ClickFix paste-and-run lure. 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 0.9971

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/free-minecraft-account-and-password-2021-game-hack PDF link annotation
    • http://famoirs.co.uk/images/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://famoirs.co.uk/images/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://famoirs.co.uk/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://famoirs.co.uk/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://famoirs.co.uk/images/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://famoirs.co.uk/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://famoirs.co.uk/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/roblox-girl_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://famoirs.co.uk/images/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/coin-master-free-spin-codes_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_off00004a37.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A37 25124 bytes
SHA-256: 7031d25485efd48d7e03968c6ee39e30f960f6a763674efb42e3bfa7a044790f
font_01_sfnt_off00008349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8349 18744 bytes
SHA-256: 32e597d278032ff7c82e1179504235c91567bf80b74fa8ae34959daeb6a42353

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