Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5681f94fd375d3a…

MALICIOUS

PDF

31.4 KB Created: 2019-05-02 05:54:21 +01:00 Authoring application: mPDF 5.7
MD5: b7a343e1f09c093b93a063d42be62b3a SHA-1: 3176fb5e0171590c7fbb73b75b7ec33f7738d2d6 SHA-256: b5681f94fd375d3ae33126bb8e9d28c2e18a33fb3c551af4e168ef623dbc7905
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While the document body is heavily obfuscated, the presence of numerous links suggests a malicious intent, possibly for SEO manipulation or to distribute further payloads. 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 0.9880

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/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/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/1090096097098099095/Maximizing-Obamacare-Your-Prescription-for-Understanding-America-s-New-Health-Care-System-by-Robert-Welk.pdf
    • http://loaminoo.linkpc.net/5090093098091091/All-Kinds-of-Minds-A-Young-Student-s-Book-about-Learning-Abilities-and-Learning-Disorders-by-Mel-Levine.pdf
    • http://loaminoo.linkpc.net/3095094098091096/Home-Learning-Year-by-Year-How-to-Design-a-Homeschool-Curriculum-from-Preschool-Through-High-School-by-Rebecca-Rupp.pdf
    • http://loaminoo.linkpc.net/1090090097098099092/Educational-Psychology-Active-Learning-Edition-by-Anita-Woolfolk.pdf
    • http://loaminoo.linkpc.net/5092090092095091/When-Helping-Hurts-Compassion-Fatigue-and-the-Veterinary-Care-Professional-by-Kathleen-Ayl.pdf
    • http://loaminoo.linkpc.net/6090098091092099/Handbook-of-Research-on-Individual-Differences-in-Computer-Assisted-Language-Learning-by-Mehrak-Rahimi.pdf
    • http://loaminoo.linkpc.net/6090098091093090/Handbook-of-Research-on-Individual-Differences-in-Computer-Assisted-Language-Learning-by-Rahimi-Mehrak.pdf
    • http://loaminoo.linkpc.net/1091099091090096090/Experiential-Learning-Emerging-Perspectives-Strategies-and-Educational-Outcomes-by-Eliott-Woods.pdf
    • 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/3091093096096093/MAGICAL-ASSORTMENT-OF-SHORT-KIDS-STORIES-14-Stories-in-1-KIDS-BOOK-PICTURES-BOOK-CHILDREN-S-BOOK-PRE-SCHOOL-FAIRLY-TALE-EARLY-LEARNING-by-Betty-J-Byers.pdf
    • http://loaminoo.linkpc.net/1091098094092091095/Why-Knowledge-Matters-Rescuing-Our-Children-from-Failed-Educational-Theories-by-E-D-Hirsch.pdf
    • http://loaminoo.linkpc.net/7099098093092093/A-Volcano-in-My-Tummy-Helping-Children-to-Handle-Anger-by-Eliane-Whitehouse.pdf
    • http://loaminoo.linkpc.net/7097091095092097/Goodbye-Workplace-Hello-Family-Helping-Moms-Find-Their-Way-Home-by-Tia-Stabenow.pdf
    • http://loaminoo.linkpc.net/3094096095097090/Helping-Children-Cope-with-the-Loss-of-a-Loved-One-A-Guide-for-Grownups-by-William-C-Kroen.pdf
    • http://loaminoo.linkpc.net/2095095096094097/Terminal-Decline-A-Surgeon-s-Diagnosis-of-the-Australian-Health-Care-System-by-Mohamed-Khadra.pdf
    • http://loaminoo.linkpc.net/6099093090095090/When-Your-Child-is-Cutting-A-Parent-s-Guide-to-Helping-Children-Overcome-Self-Injury-by-Sony-Khemlani-Petal.pdf
    • http://loaminoo.linkpc.net/9092098090096091/When-Is-Buddy-Coming-Home-A-Parent-s-Guide-to-Helping-Your-Child-with-the-Loss-of-a-Pet-by-Gary-Kurz.pdf
    • http://loaminoo.linkpc.net/3098095099093099/Swimming-Lessons-how-our-health-care-system-fails-us-a-mother-s-personal-reflections-and-cry-for-help-by-Mary-McKay.pdf
    • http://loaminoo.linkpc.net/5090093098091091/All-Kinds-of-Minds-A-Young-Student-s-Book-about-Learning-Abilities-and-Learning-Disorders-

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