Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ce2338d8e946fe…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 09:09:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 493caed3f96f5cd6aebe3f32f7c9445d SHA-1: 8581c8abac2abc84485fa3c177b0981b4ac55f71 SHA-256: b1ce2338d8e946fec6f86ae8792c059838fc34bd36c6bd3e4d505b9c496234cb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lure users with promises of game hacks and free currency for popular games like Roblox and Minecraft. The primary URL, http://netcdn.tw/app/431946152/how-to-get-free-robux-on-roblox-2021-game-hack, is flagged as a game hack redirector. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to potentially malicious sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.tw/app/431946152/how-to-get-free-robux-on-roblox-2021-game-hack PDF link annotation
    • http://www.peterbarsony.com/userfiles/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-get-free-robux-in-roblox-iphone_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/como-hackear-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/roblox-infinite-jjump-script-hack_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-get-free-robux-in-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/roblox-lumber-tycoon-2-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/roblox-prizes-free-robux_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/roblox-hack-robux-download-2021_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
stream_002_off000030d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30D5 21920 bytes
SHA-256: b329e41e85fb3a13a6427c0dc4c79a3493320dd7165e4213ffb60e26b7f9f0c5
font_01_sfnt_off00006168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6168 19460 bytes
SHA-256: a88a3b37d26ae7f28ec6954540056097f0f8d6b678a801dc09bd2df82b34d325

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