Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffda2040b409079b…

MALICIOUS

PDF

42.7 KB Created: 2021-05-18 23:51:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4a0a9fc3656dcb3856d662cf3f4cc1c8 SHA-1: d833b32e015dbc1638c5be434987d357557f0e2e SHA-256: ffda2040b409079b69e0d734cd6d0573c6d73100b940b1b0fc99529540892c4c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes hacks for mobile games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to drive traffic to potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/406889139/coin-master-hack-online-no-human-verification-game-hack PDF link annotation
    • http://tileworld.com.au/files/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/games-for-robux_GM431946152.pdfIn PDF document text
    • http://tileworld.com.au/files/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/mcpe-com_GM479516143.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://tileworld.com.au/files/coin-master-hack-online_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_off0000499c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499C 24220 bytes
SHA-256: 5d59489fe721ef2485a97b5aab69f9d21542885cc2e4537922ea85282eaad879
font_01_sfnt_off0000808a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x808A 19576 bytes
SHA-256: d6a9e498b1d4da5daa56c3c66f48fd9814654991ddf651fc87bf9992386f9808

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