Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba82b31d45eecc5…

MALICIOUS

PDF

44.5 KB Created: 2021-06-04 00:50:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a4ba2f7175466444829caef73270f9bd SHA-1: c9590bcf4d3459b0fb2fd58d07660b2ade861ccc SHA-256: 0ba82b31d45eecc5d72ee1b8ce2422a64c3a3792e8d10a3bdba5494b281d6a62
122 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to IP addresses, and is identified as a "PDF SEO Link Farm" heuristic. The document body and embedded URLs suggest a lure for game hacks, specifically "Coin Master", which is a common tactic for distributing malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.online/app/406889139/coin-master-invite-friends-hack-game-hack
    • http://183.91.70.7/repository/fb-coin-master-free-spins-link_GM406889139.pdf
    • http://183.91.70.7/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • http://183.91.70.7//repository/coin-master-gold-cards-free-2021_GM406889139.pdf
    • http://183.91.70.7/repository/coin-master-34-6-hack_GM406889139.pdf
    • http://183.91.70.7/repository/roblox-free-pets_GM431946152.pdf
    • http://183.91.70.7/repository/coin-master-free-spins-daily_GM406889139.pdf
    • http://183.91.70.7/repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdf
    • http://183.91.70.7//repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • http://183.91.70.7//repository/minecraft-java-for-free_GM479516143.pdf
    • http://183.91.70.7//repository/free-robux-no-verification-no-download_GM431946152.pdf
    • http://183.91.70.7/repository/free-links-for-coin-master_GM406889139.pdf
    • http://183.91.70.7/repository/coin-master-daily-spin-link_GM406889139.pdf
    • http://183.91.70.7//repository/how-to-get-more-spins-on-coin-master_GM406889139.pdf
    • http://183.91.70.7//repository/moonactive-coin-master-free-spins_GM406889139.pdf
    • http://183.91.70.7/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdf
    • http://183.91.70.7/repository/which-tiktok-free-movies_GM835599320.pdf
    • http://183.91.70.7//repository/moon-active-games_GM406889139.pdf
    • http://183.91.70.7/repository/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • http://183.91.70.7//repository/websites-to-get-free-robux_GM431946152.pdf
    • http://183.91.70.7//repository/coin-master-hack-xyz-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004feb.bin
fe358217a3cce160ab4eabb84cd785238eb403fef2f32fd93dc17206cd5a53d7
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FEB 26124 bytes
font_01_sfnt_off00008bc7.bin
c17a72e64d9a2a6235616ffea6c8e10af0ac15902f6f69ce92b08fd46b474d67
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC7 18168 bytes