Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53f263ab18a0c34…

MALICIOUS

PDF

25.8 KB Created: 2019-05-02 05:41:17 +01:00 Authoring application: mPDF 5.7
MD5: 9d6fae7d97e9c5c257a03ecfed056b04 SHA-1: 3ffb6914f47a1bc45c0d62f7555041bfe5f70674 SHA-256: c53f263ab18a0c346a7d62df92d14d02520fdb54b5eeaaeb8e46b94e56a4dbcf
90 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. While the URLs themselves are marked as benign, the sheer volume and structure suggest a malicious intent, possibly to manipulate search engine results or lead users to malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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/3093090098097/The-Children-of-H-rin-by-J-R-R-Tolkien.pdf
    • http://loaminoo.linkpc.net/3090094091091091/The-Children-of-H-rin-by-J-R-R-Tolkien.pdf
    • http://loaminoo.linkpc.net/9092093096098096/The-Great-Tales-of-Middle-earth-Children-of-H-rin-Beren-and-L-thien-and-The-Fall-of-Gondolin-by-J-R-R-Tolkien.pdf
    • http://loaminoo.linkpc.net/9091094095096/Tolkien-on-Fairy-stories-by-J-R-R-Tolkien.pdf
    • http://loaminoo.linkpc.net/8091095095095/The-Tolkien-Reader-by-J-R-R-Tolkien.pdf
    • http://loaminoo.linkpc.net/9097098091091093/Children-And-The-Aids-Virus-A-Book-For-Children-Parents-amp-Teachers-by-Rosmarie-Hausherr.pdf
    • http://loaminoo.linkpc.net/8097095093096092/The-Way-to-Write-for-Children-An-Introduction-to-the-Craft-of-Writing-Children-s-Literature-by-Joan-Aiken.pdf
    • http://loaminoo.linkpc.net/1090093097094097099/About-Children-and-Children-No-Longer-Collected-Papers-1942-80-by-Paula-Heimann.pdf
    • http://loaminoo.linkpc.net/8090091097094096/Stitchery-for-Children-A-Manual-for-Teachers-Parents-and-Children-by-Jacqueline-Enthoven.pdf
    • http://loaminoo.linkpc.net/3093091097093099/Five-Children-and-It-The-Phoenix-and-the-Carpet-The-Story-of-the-Amulet-Five-Children-1-3-by-E-Nesbit.pdf
    • http://loaminoo.linkpc.net/2097091099091092/Children-Are-from-Heaven-Positive-Parenting-Skills-for-Raising-Cooperative-Confident-and-Compassionate-Children-by-John-Gray.pdf
    • http://loaminoo.linkpc.net/1097099095096/Healing-Images-for-Children-Teaching-Relaxation-and-Guided-Imagery-to-Children-Facing-Cancer-and-Other-Serious-Illnesses-by-Nancy-C-Klein.pdf
    • http://loaminoo.linkpc.net/4091095091092091/Chicken-Soup-for-the-Soul-Children-with-Special-Needs-Stories-of-Love-and-Understanding-for-Those-Who-Care-for-Children-with-Disabilities-by-Jack-Canfield.pdf
    • http://loaminoo.linkpc.net/1093096091098094/Children-of-Ambition-Children-of-Vice-2-by-J-J-McAvoy.pdf
    • http://loaminoo.linkpc.net/2096097094090093/Children-of-Redemption-Children-of-Vice-3-by-J-J-McAvoy.pdf
    • http://loaminoo.linkpc.net/1091093091091094096/Five-Children-And-It-The-Story-Of-The-Amulet-Five-Children-1-amp-3-by-E-Nesbit.pdf
    • http://loaminoo.linkpc.net/6096095091095091/Children-s-Books-Sweet-as-Fruit-Books-for-kids-ages-4-11-Nutrildren---Nutrition-for-Children-Book-2-by-Shir-Guez.pdf
    • http://loaminoo.linkpc.net/9098098099092093/I-ve-Only-Got-Three-Hands-Teach-Your-Children-to-Keep-Their-Room-Clean-Bedtimes-Story-Fiction-Children-s-Picture-Book-Book-2-by-Sigal-Adler.pdf
    • http://loaminoo.linkpc.net/9097092095094090/Major-Works-on-Religion-and-Politics-Leaves-from-the-Notebook-of-a-Tamed-Cynic-Moral-Man-and-Immoral-Society-The-Children-of-Light-and-the-Children-of-Darkness-The-Irony-of-American-History-Other-Writings-by-Reinhold-Niebuhr.pdf
    • http://loaminoo.linkpc.net/3094093091094091/Children-of-the-May-Children-of-the-May-Book-1-by-S-J-Moore.pdf
    • http://loaminoo.linkpc.net/8090091097094096/Stitchery-for-

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