Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f551bc572f8dc15…

MALICIOUS

PDF

13.3 KB Created: 2019-05-02 03:27:38 +01:00 Authoring application: mPDF 5.7
MD5: d63cdb3c0df4a8ad4f36fc66c51db5f6 SHA-1: cadc3b5811dfaf5bc8c494930546376575d1146b SHA-256: 4f551bc572f8dc1514143d58c7b96ec02cd44300fb962162ed13a95e42c8ac9f
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and contains a large number of embedded links to external PDF files. These links all point to a dynamic DNS domain, suggesting an attempt to manipulate search engine results or distribute content from a controlled infrastructure. No scripts were extracted from this sample, and the document body was heavily corrupted, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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://loaminoo.linkpc.net/1092091090095/Sweetgrass-by-Mary-Alice-Monroe.pdf
    • http://loaminoo.linkpc.net/4092091093094090/The-Summer-Wind-Lowcountry-Summer-2-by-Mary-Alice-Monroe.pdf
    • http://loaminoo.linkpc.net/2091098092097091/The-Summer-Girls-Lowcountry-Summer-1-by-Mary-Alice-Monroe.pdf
    • http://loaminoo.linkpc.net/8093095094095/The-Beach-House-The-Beach-House-1-by-Sally-John.pdf
    • http://loaminoo.linkpc.net/4099093095092097/Beach-Dreams-The-Beach-House-3-by-Trish-Perry.pdf
    • http://loaminoo.linkpc.net/4091093095097090/The-Beach-House-by-J-T-Harding.pdf
    • http://loaminoo.linkpc.net/1091096094095090095/In-Sheep-s-Clothing-by-Mary-Monroe.pdf
    • http://loaminoo.linkpc.net/4097099092091/The-Beach-House-by-Jane-Green.pdf
    • http://loaminoo.linkpc.net/1091097094094090/The-Beach-House-by-Helen-McKenna.pdf
    • http://loaminoo.linkpc.net/4098099097090098/The-Beach-House-by-Georgia-Bockoven.pdf
    • http://loaminoo.linkpc.net/2093092097093099/Beach-House-Vacation-by-Allie-Wilder.pdf
    • http://loaminoo.linkpc.net/2097095092093095/Return-to-the-Beach-House-by-Georgia-Bockoven.pdf
    • http://loaminoo.linkpc.net/3099095091099094/The-House-on-Mermaid-Point-Ten-Beach-Road-3-by-Wendy-Wax.pdf
    • http://loaminoo.linkpc.net/1091093090097092091/The-House-on-the-Beach-Pilgrim-Cove-1-by-Linda-Barrett.pdf
    • http://loaminoo.linkpc.net/2092093099092097/Bright-The-House-on-Glass-Beach-2-by-Laura-Susan-Johnson.pdf
    • http://loaminoo.linkpc.net/1093091092097091/Leaving-the-Beach-A-Novel-of-Obsession-and-Music-by-Mary-Rowen.pdf
    • http://loaminoo.linkpc.net/6095093097097094/Beach-House-Baking-An-Endless-Summer-of-Delicious-Desserts-by-Lei-Shishak.pdf
    • http://loaminoo.linkpc.net/3097099093092092/Where-the-Heart-Lies-Beach-View-Boarding-House-Cliffehaven-4-by-Ellie-Dean.pdf
    • http://loaminoo.linkpc.net/1092099095096092/Second-Star-To-The-Right-by-Mary-Alice-Kruesi.pdf
    • http://loaminoo.linkpc.net/7098090090097092/ABC-Acadie-An-Acadian-Alphabet-by-Mary-Alice-Downie.pdf

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