Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3314ddf8ede195a…

MALICIOUS

PDF

42.1 KB Created: 2021-05-16 19:09:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 37199309b48332de552e9866ba375423 SHA-1: 5ff732dcf66933eeec03bf7ca60027c11e702630 SHA-256: a3314ddf8ede195a3abe8e1a799a5a152ed1ecf0a9bedd64d5963d6ec3e33b23
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are related to game hacks and free spins, indicating a potential scam or phishing attempt. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and a link farm suggests an attempt to redirect users to malicious content or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/406889139/100-free-spins-for-coin-master-2021-game-hack
    • http://klinkeridee.de/images/how-to-change-your-username-on-roblox-for-free_GM431946152.pdf
    • http://klinkeridee.de/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdf
    • http://klinkeridee.de/images/how-to-get-free-robux-com_GM431946152.pdf
    • http://klinkeridee.de/images/free-coin-master-spins-no-verification_GM406889139.pdf
    • http://klinkeridee.de/images/free-spins-for-coin-master-app_GM406889139.pdf
    • http://klinkeridee.de/images/free-spins-coin-master-links-twitter_GM406889139.pdf
    • http://klinkeridee.de/images/roblox-apk-hack_GM431946152.pdf
    • http://klinkeridee.de/images/roblox-script-hacks_GM431946152.pdf
    • http://klinkeridee.de/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • http://klinkeridee.de/images/coin-master-hack-version-download-2021_GM406889139.pdf
    • http://klinkeridee.de/images/robux-online_GM431946152.pdf
    • http://klinkeridee.de/images/links-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://klinkeridee.de/images/cm-free-spin-link-today_GM406889139.pdf
    • http://klinkeridee.de/images/rblx-city-free-robux_GM431946152.pdf
    • http://klinkeridee.de/images/free-roblox-generator_GM431946152.pdf
    • http://klinkeridee.de/images/codes-to-get-free-robux_GM431946152.pdf
    • http://klinkeridee.de/images/free-robux-without-verification-or-survey_GM431946152.pdf
    • http://klinkeridee.de/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://klinkeridee.de/images/free-coin-master-cards-link_GM406889139.pdf
    • http://klinkeridee.de/images/free-draw-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a67.bin
9cc24a0ba4fdf17cadd07bcca7c58c6353d3762925cdb6f3a295c4a66176a4c5
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A67 24500 bytes
font_01_sfnt_off00008246.bin
7a7785de19adfa5a65cd79b10bfe31691e1cdc7f9f712964e30bbfe58da4eef2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8246 18288 bytes