Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71c1dba43c97f70…

MALICIOUS

PDF

33.6 KB Created: 2021-06-27 22:56:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3da297d3db6c1b75fcee9d80fe0cbd07 SHA-1: 3bd7afcda2273b7ff308a684a3cac087562c3b28 SHA-256: e71c1dba43c97f70fe7be1e9771243cacbc6fec38f5d9853adff44b6a8a56390
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which are related to game hacks and 'free' in-game currency, indicating a scam or phishing attempt. The ML classifier and PDF link farm heuristic strongly suggest malicious intent. The document's content and embedded links are designed to trick users into visiting potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/www-roblox-tv-free-robux-game-hack PDF link annotation
    • https://resmed.ear.com.tw/image/data/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/hack-into-anyones-roblox-account-to-steal-their-robux_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/how-to-bypass-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/roblox-scam_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/free-coin-spin_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/roblox-robux-hack-tool-generator-lev-les_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/coun-master_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/free-800-robux_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://resmed.ear.com.tw/image/data/files/minecraft-pe-hacks-ios_GM479516143.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
font_00_sfnt_off00002ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED9 21256 bytes
SHA-256: a45dbd1050a445f582d999264a2e047f50a2dfcc0e6047dd883a6721dc9539a7
font_01_sfnt_off00005d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D55 19268 bytes
SHA-256: 7b1b2c7231e4d6cdc4e0de5dfff3b7f83cf901b85e4a8f9cdd07f77325015c87

Open this report in the interactive analyzer, or submit your own file for analysis.