Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1ad10866be3201…

MALICIOUS

PDF

48.1 KB Created: 2021-05-19 03:09:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cc3f4d5e56801f95bb85710a2e0faede SHA-1: 8162f88c7e53619a04fad5a1b3704e9cd0929134 SHA-256: 9f1ad10866be320124d4bd731215a9de499c8acf63d3674948de2f75523d5eb0
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, directing users to various game-related cheat and hack download pages. The ML classifier strongly indicated maliciousness, and the presence of multiple external URIs suggests an attempt to direct users to download further content. The document body, though partially corrupted, contains a URL that aligns with the observed attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/1330123889/pubg-74-uc-game-hack
    • http://lach-hotels.com/images/hack-coin-master-game-apk-download_GM406889139.pdf
    • http://lach-hotels.com/images/coin-master-fan-page_GM406889139.pdf
    • http://lach-hotels.com/images/free-robux-microsoft_GM431946152.pdf
    • http://lach-hotels.com/images/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://lach-hotels.com/images/free-coin-master-credit_GM406889139.pdf
    • http://lach-hotels.com/images/how-to-hack-in-roblox-prison-life_GM431946152.pdf
    • http://lach-hotels.com/images/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://lach-hotels.com/images/coin-master-hack-lost-world-2021_GM406889139.pdf
    • http://lach-hotels.com/images/how-to-make-roblox-clothes-for-free_GM431946152.pdf
    • http://lach-hotels.com/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdf
    • http://lach-hotels.com/images/master-8-ball-pool-free-coins_GM406889139.pdf
    • http://lach-hotels.com/images/roblox-survey-for-robux_GM431946152.pdf
    • http://lach-hotels.com/images/how-to-hack-a-roblox-account-easy_GM431946152.pdf
    • http://lach-hotels.com/images/how-to-get-coin-master-card-free_GM406889139.pdf
    • http://lach-hotels.com/images/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdf
    • http://lach-hotels.com/images/coin-master-free-spins-link-today-twitter_GM406889139.pdf
    • http://lach-hotels.com/images/coin-master-free-daily-spins_GM406889139.pdf
    • http://lach-hotels.com/images/roblox-com-hack_GM431946152.pdf
    • http://lach-hotels.com/images/but-link-says-free-robux_GM431946152.pdf
    • http://lach-hotels.com/images/coin-master-free-spins-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048df.bin
8367590141ff96cbbcb47dd80f0846723a070aca2e469a8bb213cbc8b077048b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48DF 37260 bytes
font_01_sfnt_off00009aef.bin
ff38f4530a1f801868d052cc87eea5dfb2762b967445f77af2a416632fdfb23f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AEF 18016 bytes