Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26d048dfde11146…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 02:21:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 636b19d773f56295077225a1f2a937d8 SHA-1: c86d4f45dd7c61cc133adc895418f926fc9ce4e8 SHA-256: c26d048dfde1114694c48a7315954a7f52c369eccaed822bda573ee02efb57e1
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are SEO-optimized and point to pages offering game-related hacks or free items. The primary URL, http://netcdn.tw/app/479516143/minecraft-ps4-free-game-hack, suggests a lure for downloading game cheats or exploits. The ML classifier also strongly indicated maliciousness, supporting the assessment of a phishing or malware distribution attempt.

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.tw/app/479516143/minecraft-ps4-free-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-roblox-20-body-for-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-items-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-free-meme-clothes_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-garbage-simulator-script-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-wikipedia-free-encyclopedia_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/boku-no-roblox-infinite-spin-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-python-code-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-stuff-on-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/do-you-get-free-robux-with-builders-club-2021-bonus_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-currency-hack-lua-script_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-50-robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hacks-para-roblox-2021-noviembre_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
font_00_sfnt_off0000367a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x367A 22700 bytes
SHA-256: 61763f4d83ca8d07298588c975320f229784056763273f945b8a60874a86f752
font_01_sfnt_off00006927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6927 18072 bytes
SHA-256: 07bff6b201fefb5b79bda7bcb703d65895bb3fadc7074254717ea8518f49b268

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