Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d6fd690f1bf39d…

MALICIOUS

PDF

15.7 KB Created: 2019-05-02 07:31:26 +01:00 Authoring application: mPDF 5.7
MD5: e459e6971a6b26e82115213bfb264213 SHA-1: 913b252ada79776a76a57a9b3b1b8734b4ff79c3 SHA-256: 92d6fd690f1bf39d197c9933b92ea789b09ed2d63f36588277b97f02501bc697
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. While many of these links point to benign book titles, the sheer volume and the ML classifier's high confidence score suggest a malicious intent, likely to manipulate search engine results or distribute malicious payloads through these links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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/1738732731739/Claire-Murray-Nantucket-Inspirations-Designs-Charts-amp-Folklore-by-Claire-Murray.pdf
    • http://cefasfese.4pu.com/1730738730738737737/An-Atheist-Epic-Bill-Murray-the-Bible-and-the-Baltimore-Board-of-Education-by-Madalyn-Murray-O-39-Hair.pdf
    • http://cefasfese.4pu.com/3739739738731737/Legends-of-the-Black-Orchid-by-Murray-Ian-Murray.pdf
    • http://cefasfese.4pu.com/4733737732731737/Pauli-Murray-The-Autobiography-of-a-Black-Activist-Feminist-Lawyer-Priest-and-Poet-by-Pauli-Murray.pdf
    • http://cefasfese.4pu.com/4739733735733731/Leave-It-to-Claire-Claire-Everett-1-by-Tracey-Bateman.pdf
    • http://cefasfese.4pu.com/4739733736733739/Claire-Knows-Best-Claire-Everett-2-by-Tracey-Bateman.pdf
    • http://cefasfese.4pu.com/1730738730733732737/Silken-Inspirations-Shadow-Work-Embroidery-Designs-by-Allison-Seils.pdf
    • http://cefasfese.4pu.com/6730738733/Finding-Claire-Fletcher-Claire-Fletcher-1-by-Lisa-Regan.pdf
    • http://cefasfese.4pu.com/4730735737739730/Claire-de-Lune-Claire-de-Lune-1-by-Christine-Johnson.pdf
    • http://cefasfese.4pu.com/9737730739738/The-Strange-by-J-B-Murray.pdf
    • http://cefasfese.4pu.com/1732739736738733/Into-the-Mist-by-Lee-Murray.pdf
    • http://cefasfese.4pu.com/8733735733735734/Renee-And-Jay-by-J-J-Murray.pdf
    • http://cefasfese.4pu.com/5731736734730735/Homesickness-A-Novel-by-Murray-Bail.pdf
    • http://cefasfese.4pu.com/6739734738738733/Through-the-Riptide-by-Bert-Murray.pdf
    • http://cefasfese.4pu.com/1737733730737731/Collaborator-by-Murray-Davies.pdf
    • http://cefasfese.4pu.com/6737730735736733/Ramadan-by-Julie-Murray.pdf
    • http://cefasfese.4pu.com/9737739739735/Islamophilia-by-Douglas-Murray.pdf
    • http://cefasfese.4pu.com/1736732730734739/Third-Planet-by-Murray-Leinster.pdf
    • http://cefasfese.4pu.com/2735739737731730/Double-Ugly-by-Jim-Murray.pdf
    • http://cefasfese.4pu.com/4735739738738732/New-Collected-Poems-by-Les-Murray.pdf
    • http://cefasfese.4pu.com/4739733736733739/Cla

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