Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb3c560eabde5fb…

MALICIOUS

PDF

46.2 KB Created: 2021-06-09 03:40:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5a432d8569c6949c716821aa235b6e9e SHA-1: d286f8ca7dba9d3c4895050c9f1b3229d04b1d65 SHA-256: ebb3c560eabde5fb2ea48b8ebb2f8abdb1bc0ccdfb82c54ed8a9c350b00f7e24
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains numerous embedded links, many of which are structured as SEO-optimized PDF links, suggesting a link farm. The document impersonates Microsoft and uses a lure related to hacking games to trick users into clicking a link hosted on `netcdn.tw`. This behavior is indicative of credential phishing or a downloader for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/how-to-hack-dragon-ball-rage-on-roblox-game-hack.
  • 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.tw/app/431946152/how-to-hack-dragon-ball-rage-on-roblox-game-hack PDF link annotation
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-pokeballs-in-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/redeem-card-codes-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-be-a-hacker-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/without-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-spins-for-coin-master_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_004_off000053e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53E1 26068 bytes
SHA-256: 99a4b1fe85164479603dec2d68f9e7b860a265ef845098767d80dae5d32b833f
font_01_sfnt_off00009036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9036 18800 bytes
SHA-256: a28723b820c5f3301eb74d9c932e887e13fb65d4ffac8f6fb61a864c5916a69c

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