Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f2c8451cc8423c…

MALICIOUS

PDF

27.4 KB Created: 2019-05-02 21:08:42 +01:00 Authoring application: mPDF 5.7
MD5: a7df607ac170fa3322a645b834f523b5 SHA-1: 6d21027f8453e485afd08d23f92520274a05c9c5 SHA-256: c4f2c8451cc8423c10a826b23303faff4b2aefa04614d2cb8e75bb3837f40dee
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a mass external link farm, with 32 links identified. The ML classifier also strongly indicated maliciousness. While the extracted URLs themselves are currently marked as benign, the sheer volume and nature of the links suggest a malicious intent, likely to manipulate search engine results or redirect users to harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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
    • http://loaminoo.linkpc.net/5094091093092096/Journey-to-the-Fatherless-Preparing-for-the-Journey-of-Adoption-Orphan-Care-Foster-Care-and-Humanitarian-Relief-for-Vulnerable-Children-by-Lawrence-E-Bergeron.pdf
    • http://loaminoo.linkpc.net/5098097091096/Handle-with-Care-An-Unusual-Butterfly-Journey-by-Loree-Griffin-Burns.pdf
    • http://loaminoo.linkpc.net/5098098092099093/Puppy-Intensive-Care-A-Breeder-s-Guide-to-Care-of-Newborn-Puppies-by-Myra-Savant-harris.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/1099091094094099/Best-Care-Anywhere-Why-VA-Health-Care-Is-Better-Than-Yours-by-Phillip-Longman.pdf
    • http://loaminoo.linkpc.net/3098099090091091/From-Both-Sides-A-Look-into-the-World-of-Foster-Care-from-Those-Who-Know-It-Best-by-Maranda-Russell.pdf
    • http://loaminoo.linkpc.net/4097093091096093/Adoption-Is-a-Lifelong-Journey-by-Kelly-DiBenedetto.pdf
    • http://loaminoo.linkpc.net/4097098099092092/Temporary-Child-A-Foster-Care-Survivor-s-Story-by-Edward-J-Benzola.pdf
    • http://loaminoo.linkpc.net/4095098094097096/Child-Care-A-Comprehensive-Guide-4-Volumes-Volume-1--Rationale-for-Child-Care-Services-Programs-Vs-Politics-by-Stevanne-Auerbach.pdf
    • http://loaminoo.linkpc.net/9099097091099094/Motherhood-How-Should-We-Care-For-Our-Children-by-Anne-Manne.pdf
    • http://loaminoo.linkpc.net/1091093093091098096/Emergency-Care-amp-Workbook-for-Emergency-Care-Package-13th-Edition-by-Daniel-Limmer.pdf
    • http://loaminoo.linkpc.net/1098094091098098/Daughter-of-the-Ganges-The-Story-of-One-Girl-s-Adoption-and-Her-Return-Journey-to-India-by-Asha-Mir-.pdf
    • http://loaminoo.linkpc.net/4093097096096098/Go-to-work-and-do-your-job-Care-for-your-children-Pay-your-bills-Obey-the-law-Buy-products-by-Noah-Cicero.pdf
    • http://loaminoo.linkpc.net/7092098093092093/Child-Care-and-Inequality-Rethinking-Carework-for-Children-and-Youth-by-Francesca-M-Cancian.pdf
    • http://loaminoo.linkpc.net/1090093093095096092/Love-s-Orphan-My-Journey-of-Hope-and-Faith-by-Ildiko-Scott.pdf
    • http://loaminoo.linkpc.net/1090093096093092090/Nursing-Care-of-Children-RN-EDITION-7-0-Content-Mastery-Series-Review-Module-by-Jeanne-Wissmann.pdf
    • http://loaminoo.linkpc.net/4096091093093096/Educational-Care-A-System-for-Understanding-and-Helping-Children-with-Learning-Differences-at-Home-and-in-School-by-Mel-Levine.pdf
    • http://loaminoo.linkpc.net/5090094091096097/Teaching-Children-to-Care-Classroom-Management-for-Ethical-and-Academic-Growth-K-8-by-Ruth-Sidney-Charney.pdf
    • http://loaminoo.linkpc.net/9099099095096/The-Guardianship-of-Best-Interests-Institutional-Care-for-the-Children-of-the-Poor-in-Halifax-1850-1960-by-Ren-e-N-Lafferty.pdf
    • http://loaminoo.linkpc.net/1091096098097096092/Humanitarian-Logistics-Meeting-the-Challenge-of-Preparing-for-and-Responding-to-Disasters-by-Martin-Christopher.pdf

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