Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba4174f10a4214b…

MALICIOUS

PDF

27.1 KB Created: 2019-06-04 19:40:46 +01:00 Authoring application: mPDF 5.7
MD5: 9d8148bbbc6cf9d5774ac97c6f781cf2 SHA-1: a1761d57bfac2a16e4138f109a37f1853cb814aa SHA-256: dba4174f10a4214b01cb47afed3bffc57f8e1c6c1a745f5925e0c3b86ad6c4ff
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs, identified as a link farm. While most of these URLs were classified as benign, the sheer volume and the heuristic firing of PDF_SEO_LINK_FARM suggest a malicious intent, possibly for SEO manipulation or to redirect users to malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9742

Heuristics 2

  • 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.
  • 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://cefasfese.4pu.com/3734733730738730/The-Perfectly-Useless-Book-of-Useless-Information-You-ll-Never-Need-to-Know-Anything-That-s-in-This-Book-But-Read-It-Anyway-by-Don-Voorhees.pdf
    • http://cefasfese.4pu.com/9739738739739730/The-Ultimate-Book-Of-Useless-Information-by-Keith-Waterhouse.pdf
    • http://cefasfese.4pu.com/2735738736738737/The-Ultimate-Book-of-Useless-Information-A-Few-Thousand-More-Things-You-Might-Need-to-Know-by-Noel-Botham.pdf
    • http://cefasfese.4pu.com/8734735733/Useless-Magic-by-Florence-Welch.pdf
    • http://cefasfese.4pu.com/3733739734734735/Useless-Magic-Lyrics-and-Poetry-by-Florence-Welch.pdf
    • http://cefasfese.4pu.com/7734737739732732/Manservant---The-Inferior---Useless-Beauty-Revisited-Three-Works-of-Erotic-Human-Bondage-by-Ms-Rachilde.pdf
    • http://cefasfese.4pu.com/9735738732736/The-Party-Is-Over-How-Republicans-Went-Crazy-Democrats-Became-Useless-and-the-Middle-Class-Got-Shafted-by-Mike-Lofgren.pdf
    • http://cefasfese.4pu.com/5730730739737738/My-Master-s-Degree-Is-Useless-How-Chelsea-Handler-Booze-and-Reality-TV-Teach-Better-Modern-Day-Business-Lessons-Better-Than-the-Lecture-Halls-by-Sonja-Landis.pdf
    • http://cefasfese.4pu.com/4731732739736734/The-Book-You-Shouldn-t-Have-Read-A-Motivational-Inspirational-Book-by-Pheng-Taing.pdf
    • http://cefasfese.4pu.com/5732735739739737/How-to-Read-the-Bible-Book-by-Book-A-Guided-Tour-by-Gordon-D-Fee.pdf
    • http://cefasfese.4pu.com/4730733734739732/Go-Away-Dog-An-I-Can-Read-Book-Picture-Book-Series-by-Joan-L-Nodset.pdf
    • http://cefasfese.4pu.com/4738735738739731/Hurrah-for-Gin-A-book-for-perfectly-imperfect-parents-by-Katie-Kirby.pdf
    • http://cefasfese.4pu.com/7733734736735738/Edition-1nd-Just-1-hour-Amazing-Singapore-Travelling-Book-Bring-this-book-to-travel-This-book-is-NEW-This-book-includes-7-important-expression-for-this-book-by-Takuji-Ekawa.pdf
    • http://cefasfese.4pu.com/1739735738736732/The-quot-Big-Read-quot-Book-of-Books-Big-Read-2003-by-Mark-Harrison.pdf
    • http://cefasfese.4pu.com/5732730735738/How-to-get-the-best-out-of-Life-Book-Read-this-short-Book-and-your-life-will-never-be-the-same-by-Ayan.pdf
    • http://cefasfese.4pu.com/7733734736735735/NEW-Edition-Just-1-hour-Amazing-Hawaii-Travelling-Book-Bring-this-book-to-travel-This-book-is-NEW-Edition-This-book-includes-7-important-expression-this-book-by-Takuji-Ekawa.pdf
    • http://cefasfese.4pu.com/7733734736736733/Edition-1nd-Just-1-hour-Amazing-London-Travelling-Book-Bring-this-book-to-travel-This-book-is-NEW-This-book-includes-7-important-expression-for-travelling-this-book-Travel-English-by-Takuji-Ekawa.pdf
    • http://cefasfese.4pu.com/3733736738733735/The-Book-No-One-Ever-Read-by-Cornelia-Funke.pdf
    • http://cefasfese.4pu.com/5732731734738733/Think-of-an-Eel-Big-Book-Read-and-Wonder-by-Karen-Wallace.pdf
    • http://cefasfese.4pu.com/2733738734730738/The-Book-Lovers-Companion-What-to-Read-Next-by-Lionel-Shriver.pdf

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