Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebee3b1bf26940e1…

MALICIOUS

PDF

43.5 KB Created: 2021-05-15 16:32:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2b0fbe1fbcd3c83ed4b6dac0d7b0d206 SHA-1: 6eeb90c4d2063a1f94cc6132cf1efcc7f39f2292 SHA-256: ebee3b1bf26940e16d9de5a2ca82a9496c3e15bdd229fb00300c0000c7ac68fa
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are SEO-optimized PDFs designed to appear as game-related content like 'free generators' or 'hacks'. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of these links, suggesting a link farm or redirection scheme. The primary lure appears to be related to Roblox and Coin Master, aiming to trick users into visiting potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/roblox-hacked-accounts-list-game-hack PDF link annotation
    • http://lakeshistory.com/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lakeshistory.com/images/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lakeshistory.com/images/free-clothing-on-roblox_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_003_off000047fc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47FC 26816 bytes
SHA-256: 24cb15ba85f498b1326be4cf75214ab00e78f09eaf6a68fba4eb58e4ec38124f
font_01_sfnt_off00008632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8632 18720 bytes
SHA-256: fc7b133a6c1dcbd831a87427d92a14fbfb4bbc577a85d8c62e04ee2ff9906700

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