Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec72656f132fb978…

MALICIOUS

PDF

34.0 KB Created: 2021-06-18 16:41:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7343ccb0772738a3ad1b5c8c2e501c88 SHA-1: cd0dd353132ac9cfa5e7582ace2e097676357217 SHA-256: ec72656f132fb97889541a09fbc11f163716431e79ca0ded19119299c11271e9
122 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, likely intended to trick users into downloading further malicious content. The presence of a large number of SEO-optimized links pointing to other PDF files, combined with the document body's theme of game cheats and hacks, strongly suggests a link farm or phishing attempt. The ML classifier also flagged this document with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/guess-the-song-cheats-roblox-game-hack PDF link annotation
    • http://medinup.pt/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-to-hack-roblox-tix-with-cheat-engine-63_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-yo-hac-roblox-and-get-a-key-card-hack_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-2021-robux-no-human-verification-easy_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-recover-hacked-account_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/400-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/all-of-the-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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
font_00_sfnt_off00002d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D4E 23300 bytes
SHA-256: d08e4e3f87518b08298a2d063a4eb52ab575fba53edeed89c7b83051d0304225
font_01_sfnt_off000060d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D6 18708 bytes
SHA-256: b2e631980be5c519b44c7887cedd5fea17e325c7ad5d66ca11ee14fe29fcfcb5

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