Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd38b5221c931e5…

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 01:06:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b7ad49bceee1b0d11bdcbfd1c13f0a1c SHA-1: 0c4fe548b8ed0952470ee301f8e48f7d65a5e3cf SHA-256: 2dd38b5221c931e5f9a1711e1594bab5e6c06cd8b1f32d1e0c8656398c091506
142 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 point to other PDFs hosted on similar domains, forming a link farm. These links are disguised as free downloads for popular games and cheats, indicating a lure to download potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/479516143/minecraft-free-download-android-apk-game-hack PDF link annotation
    • http://greasley.website/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/wurst-hacked-client_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
font_00_sfnt_off00004b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B35 24216 bytes
SHA-256: 5b095089f24ced83bde858623e77f97e97fc2d2fbb591ce102a91828a1df10b1
font_01_sfnt_off000081aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AA 18636 bytes
SHA-256: 653028bcb0f2fb6608854d40a7a9db9360db480d39b3fa53a0b8dd523b133d01

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