Malicious PDF — malware analysis report

Static analysis result for SHA-256 63da5d1c2c2de8cc…

MALICIOUS

PDF

41.8 KB Created: 2021-05-19 02:15:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1c003dd73dbd9690d8aef60d99b2e084 SHA-1: 34bec4fa6dc270bb5c6ef255492a12929faf1ded SHA-256: 63da5d1c2c2de8cca44e1ed8e432c10eb347c0c760756012ed99364c15c5aa10
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to pages offering hacked game applications and free in-game currency. The ML classifier strongly indicated maliciousness, and the presence of a visual download button further supports a lure-based attack pattern. The document's primary purpose appears to be directing users to download potentially unwanted or malicious software from external sites.

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-hacked-apk-download-for-android-game-hack PDF link annotation
    • http://bw.ac.th/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/robux-redeem_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-link_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000487f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487F 24980 bytes
SHA-256: efcab66dd77eaae3f42dd7a2c6ccd4aa7dd72870dbc33f3f069079b805bfd978
font_01_sfnt_off00007ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFD 18636 bytes
SHA-256: 87f24663a42dd6b293392c347e04cdb733edd0a8e3460407db1e5d5abad0db8a

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